New Sky-Watcher 150EDX APO Telescope - redesigned body with famous Esprit optics

**Due in late September/August**

Highlights:

• Air Spaced Apochromatic Triplet
• FPL-53 extra low dispersion glass
• Zero detectable colour fringing even on bright objects
• Diffraction limited optics
• Fully multi coated lenses
• 3″ CNC machined 11:1 dual speed linear power focuser – rotatable
• Indexed focuser tube
• Knife-edge baffled system to enhance contrast

The Sky-Watcher 150mm Esprit 150ED Triplet APO Refractor is a high-end  instrument for astro-photographers seeking quality images that only a telescope of this size and optical design can produce. It's also ideal for extended visual observations of deep-space objects due to its remarkable contrast and light gathering ability.

The air spaced apochromatic triplet lenses use the remarkable Ohara FPL-53 ED (extra low dispersion) glass, with exceptional colour correction over the entire visible spectrum there is no chromatic aberration even on bright objects! Knife edge baffles reduce internal reflections and increase contrast, helping to bring out faint structure in deep sky objects.

A 2-element field flattener is available separately to iron out the natural off-axis astigmatism and field curvature of the objective lens, leaving a fully corrected 42mm field of view.  Designed with photography in mind, it sits on two tracks above and below the barrel to prevent flexure with a heavy camera attached, and is fully rotatable to perfectly frame a target on the sensor.

In The Box:

• 150/1050 Apochromatic Refractor
• Fixed Dew Shield
• 2″ Dielectric Star Diagonal
• 9×50 Right Angled Erect Image Diagonal
• D Style dovetail Bar
• 2″ to 1.25″ Eyepiece Adaptor
• Aluminium Foam-Lined Case

SPECIFICATIONS

APO140FL F/7 于 2017 年首次亮相，旨在向 TEC 最早的设计之一 APO140ED 致敬，并迅速成为 TEC 最受欢迎的型号。

• APO140FL F/7 采用油隔复消色差三片式物镜，中间元件为萤石 (CaF ₂ )，可实现针对视觉使用和成像优化的色彩校正。这种油隔三片式设计与物镜所有表面的多层涂层相结合，可确保最大程度的透光率。
• 物镜安装在铝制容器内，具有出色的温度调节性能，同时重量轻且坚固。
• 光学组件位于一个轻质铝管中，该铝管的整个内部都采用了防反射涂层和锋利边缘的挡板，并且无需考虑准直——在望远镜离开 TEC 后，无需进行任何调整。
• 此外，干净利落的全白组装彰显了 TEC 一贯的优雅手工品质。这款紧凑而永恒的设计将带来深厚的对比度和丰富自然的色彩。
• 每台 APO140FL F/7 都配备了 Starlight Instruments FTF#3545 Feather Touch 调焦器，该调焦器是与 TEC 合作设计的。这是 Starlight Instruments 最大的旋转调焦器，具有粗调和微调 9:1 行星减速组件。
  • APO140FL F/7 可应要求安装到其他调焦器型号。请联系 TEC 确认所需调焦器是否适合所需 TEC 型号。
• 2 英寸锁定金属夹头对温度波动不敏感，并能以高精度和同心度保持负载。
• 能够容纳多种目镜和支架。

TEC APO140FL F/7 采用经典折射镜设计，设计简洁，不折不扣，让大自然的奇观不言而喻。所有价格和供货情况如有变更，恕不另行通知

推荐配件；

• 精密可调管环
• 9 英寸燕尾板和手柄方便运输，并可与大多数支架无缝贴合。
• 焦距缩减校正器将 F/7 比率转换为 F/6.2，后焦距为 115 毫米。
• TEC运输箱可方便观察地点之间的运输。
• TEC 紧凑型箱，方便提起和运输。
• 10×60 Baader Vario 寻星镜，配有 TEC 寻星镜支架和用于望远镜安装的底座。
• 7×50 Vixen 寻星镜，配有TEC 寻星镜支架和用于望远镜安装的底座。
• Gutekunst 紧凑型大气色散校正器 (ADC)。

测试和质量保证

TEC 望远镜经过严格测试，以确保顶级品质性能。整个玻璃生产过程中都使用牛顿环，然后我们使用干涉仪纠正任何剩余的缺陷。然后对每台望远镜进行严格测试，以达到最佳的斯特列尔比。请放心，您的望远镜已经过优化，光学性能尽可能完美。如果物镜没有达到 Yuri 的期望，望远镜将不会发货。作为一项严格政策，TEC 不会发布望远镜测试报告。

虽然物镜在干涉控制下经过微调以满足最高的光学标准，但物镜和镜筒组件中可能存在外观缺陷。请放心，望远镜中的任何缺陷均已确定不会影响光学性能。

Sky-Watcher 127mm/1500mm Skymax 127 Maksutov-Cassegrain OTA

• Compact dimensions, ideal for transportation
• Practical main mirror focusing mechanism
• Universal accessory adaptation
• High contrast image without distracting false colour
• Quick release system for the tube
• Impressive viewing capabilities for its price range
• 5 years Sky-Watcher limited warranty

The Sky-Watcher Black Diamond 130/650 Photo Reflector OTA is a 130mm aperture Newtonian reflector with diffraction limited optics, all the light gathering power you need for visual use or astrophotography! Newtonian reflector telescopes are among the most cost effective design on the market, reaching much larger apertures than an equivalently priced refractor. The large aperture will help resolve faint, extended objects like nebulae and galaxies, whilst the 650mm focal length will reveal fine details of lunar craters.

The 130/650 Photo Reflector is equipped with an excellent Crayford dual speed focuser allowing fast, coarse regulation followed by a precise 10:1 reduction adjustment knob to reach the optimal focus. A 3 element 28mm LET eyepiece is provided, allowing 23x magnification and a 56° apparent field of view with 20mm of eye relief. The aluminised primary mirror is aspheric (parabolic profile) offering an optical system free from spherical aberration. The secondary mirror is thin to allow fast cooling and it is held by extra thin spider supports for minimal diffraction spike effects on bright stars and increased contrast.

In The Box:

• SkyWatcher Black Diamond 130/650 Photo Reflector OTA
• 28mm LET Eyepiece
• 6×30 Finder Scope
• 130mm Tube Rings
• Dovetail Bar

BORG 90FL CR 具有出色的光学分辨率，这是由佳能奥普特龙公司内置于物镜光学设计的复消色差萤石玻璃元件实现的，并且具有超远距 500 毫米焦距和 f/5.6 的光圈。

这是在澳大利亚丛林和城市环境中观察天体和鸟类生活的绝佳装备。

由于采用可拆卸碳纤维制成的镜筒，90mm 的前部元件直径不会影响 90FL 的超紧凑和轻便功能。推荐用于星空、星云、星团和行星观测。您可以通过将棱镜和目镜与 BORG 相机安装适配器（单独出售）交换，将此望远镜转换为远摄镜头。

• 物镜配备佳能 Optron 公司出品的复消色差萤石玻璃元件。
• 物镜光学设计：2 片 2 组，萤石，复消色差，全镀膜。
• 坚固而美观的碳纤维桶。
• BORG 80Ø 枪管系统。
• 齿条齿轮调焦系统。
• 正立棱镜（包含在内）允许用户观察地面物体和天体。
• 包括 20 毫米和 9 毫米目镜。
• 结构轻巧，仅 3 公斤（包括配件）。
• Arca-Swiss 快速释放系统三脚架板。
• 物镜和主要部件均由日本制造。

“CR”代表碳纤维镜筒和齿条齿轮调焦系统。

相机安装适配器和其他相机组件单独出售。

主要特点

RC20’s Key Features

Large Aperture and Ritchey-Chrétien Optics

The RC20 features a purely reflective Ritchey-Chrétien optical system, which includes high-quality mirrors with enhanced coatings. This setup minimizes chromatic aberration and ensures excellent light throughput, providing superb image fidelity and contrast. This optical design shines when making observations, primarily on-axis, and wide-field imaging is not a concern.

Mechanical Structure

Constructed from lightweight yet durable materials, including a dual carbon-fiber truss design, the 20-inch Ritchey-Chrétien ensures structural integrity and reduces the overall weight. This makes it easier to handle and mount on various telescope mounts.

Thermal Management

Equipped with three cooling fans at the back of the telescope, the RC20 achieves thermal equilibrium quickly. This feature helps to reduce air turbulence inside the telescope tube, minimizing thermal distortions and maintaining optimal imaging conditions.

Application-Specific Benefits

Astrophotography

The large aperture and precision optics of the 20-Inch Ritchey-Chrétien enable astrophotographers to capture detailed and crisp images of celestial phenomena, making it an excellent tool for capturing faint galaxies, nebulae, and star clusters.

Astronomy Research

With its reliable performance and detailed imaging capabilities, the 20-inch Ritchey-Chrétien is a valuable asset for universities and research observatories that engage in complex studies such as stellar classification, photometric research, and other scientific investigations.

Optical Systems

Secondary Mirro

Primary Mirror

Large Aperture and Optimized Focal Ratio

The IRDK24 features a generous 610 mm aperture paired with an f/6.5 focal ratio, enhancing its ability to capture light effectively. This combination is ideal for detailed infrared observations and long-exposure imaging, providing superb light-gathering capabilities.

Specialized Optical Design for Infrared

The Dall-Kirkham optical design of the IRDK24 is optimized for infrared wavelengths. There are no refractive lenses, only reflective fused silica mirrors. Reflective coatings are a protected gold with better than 98% reflectivity from .65 microns (650nm) to 5 microns (5000nm), ideal for infrared astronomy or LIDAR applications. UV-optimized coatings can also be provided, so please contact our technical sales team to discuss UV optimization.

Robust Mechanical Structure

Constructed using carbon fiber, the optical tube of the IRDK24 offers durability and stability with minimal thermal expansion. This design ensures consistent performance under varying environmental conditions, making it suitable for intensive scientific applications.

Advanced Thermal Management

The IRDK24 incorporates cooling fans and a system ready for Delta-T applications, facilitating rapid thermal equilibrium. This setup is crucial for minimizing air turbulence within the tube, thus reducing potential image distortion and enhancing overall imaging quality.

Integrated Dew Control

Infrared observations can be susceptible to condensation, but the IRDK24 addresses this with sophisticated dew prevention technology. Heater pads, controlled via PlaneWave’s software, ensure the optical surfaces remain clear from dew, thereby maintaining consistent and clear imaging performance.

Application-Specific Benefits

Infrared Astronomy: The IRDK24 is especially effective for infrared astronomy, where its large aperture and infrared-optimized optics allow for detailed observation of celestial objects in infrared light. This capability is essential for studying astrophysical phenomena invisible to the naked eye or standard optical wavelengths.

Advanced Research and LIDAR Applications: With its specialized design and infrared optimization, the IRDK24 is a robust platform for advanced scientific research, including LIDAR.

Optical Systems

Primary Mirror

Secondary Mirror

IRDK20’s Key Features

Large Aperture and Optimized Focal Ratio

The IRDK20 features a substantial 508 mm aperture and an f/6.8 focal ratio, enhancing its ability to gather infrared light effectively. This setup is ideal for detailed infrared observations and long-exposure imaging, offering excellent light-gathering capabilities.

Specialized Optical Design for Infrared

The Dall-Kirkham optical design of the IRDK20 is optimized for infrared wavelengths. There are no refractive lenses, only reflective fused silica mirrors. The reflective coatings are a protected gold with better than 98% reflectivity from .65 microns (650nm) to 5 microns (5000nm), ideal for infrared astronomy or LIDAR applications. UV-optimized coatings can also be provided, so please contact our technical sales team to discuss UV optimization.

Robust Mechanical Structure

Constructed using carbon fiber, the optical tube of the IRDK20 provides durability and stability with minimal thermal expansion. This design ensures consistent performance across varying environmental conditions, making it suitable for intensive scientific applications.

Advanced Thermal Management

The IRDK20 includes cooling fans and a system prepared for Delta-T applications, promoting rapid thermal equilibrium. This setup is crucial for minimizing air turbulence within the tube, thus reducing potential image distortion and enhancing overall imaging quality.

Integrated Dew Control

Infrared observations can be prone to condensation, but the IRDK20 addresses this with advanced dew prevention technology. Heater pads, controlled via PlaneWave’s software, ensure the optical surfaces remain clear from dew, maintaining consistent and clear imaging performance.

Application-Specific Benefits

Infrared Astronomy

The IRDK20 excels in infrared astronomy, where its large aperture and infrared-optimized optics allow for detailed observation of celestial objects in infrared light. This capability is crucial for studying astrophysical phenomena invisible to the naked eye or standard optical wavelengths.

Advanced Research and LIDAR Applications

With its specialized design and infrared optimization, the IRDK20 is a robust platform for advanced scientific research, including LIDAR applications.

Optical Systems

Secondary Mirror

Primary Mirror

PlaneWave 17" 优化版采用 Dall-Kirkham 光学设计，其涂层经过优化，可在红外或紫外波长下传输。它在焦平面上 20 毫米图像圈内衍射受限。设计中没有折射透镜，只有反射组件。对于红外应用，反射涂层是一种受保护的金，可在 0.65 微米（650nm）至 5 微米（5000nm）范围内提供超过 98% 的反射率。这种设计非常适合红外天文学或激光雷达应用。也可以使用紫外线优化涂层，但需额外付费。

光学系统

次镜

次镜

三级镜

标准功能

运输尺寸和重量

板条箱尺寸：148厘米 x 77厘米 x 94厘米（58英寸 x 30英寸 x 37英寸）

板条箱运输重量：105 公斤（225 磅）

注意：本产品的交货期较长，如需更多信息，请发送电子邮件至： education@bintel.com.au

The IRDK14 from PlaneWave Instruments is a precisely engineered optical system designed for high performance in infrared wavelengths. It is an excellent tool for advanced astronomical research and remote sensing applications, offering superior performance for infrared imaging.

IRDK14’s Key Features

Large Aperture and Optimized Focal Ratio

The IRDK14 features a 356 mm aperture and an f/7.2 focal ratio, enhancing its capacity to gather infrared light effectively. This setup is ideal for detailed infrared observations and long-exposure imaging, providing exceptional light-gathering capabilities.

Specialized Optical Design for Infrared

The Dall-Kirkham optical design of the IRDK14 is optimized for infrared wavelengths. There are no refractive lenses, only reflective fused silica mirrors. The reflective coatings are a protected gold with better than 98% reflectivity from .65 microns (650nm) to 5 microns (5000nm), making it well-suited for infrared astronomy or LIDAR applications. UV-optimized coatings can also be provided, and potential customers are encouraged to contact our technical sales team to discuss UV optimization.

Robust Mechanical Structure

Constructed using carbon fiber, the optical tube of the IRDK14 offers durability and stability with minimal thermal expansion. This design ensures consistent performance under various environmental conditions, making it suitable for intensive scientific applications.

Advanced Thermal Management

The IRDK14 includes cooling fans and a system prepared for Delta-T applications, promoting rapid thermal equilibrium. This feature is critical for minimizing air turbulence within the tube, thus reducing potential image distortion and enhancing overall imaging quality.

Integrated Dew Control

Infrared observations are prone to condensation, but the IRDK14 tackles this with advanced dew prevention technology. Heater pads, controlled via PlaneWave’s software, ensure the optical surfaces stay clear from dew, maintaining consistent and clear imaging performance.

Application-Specific Benefits

Infrared Astronomy

The IRDK14 excels in infrared astronomy, where its significant aperture and infrared-optimized optics allow for precise observation of celestial objects in infrared light. This capability is essential for studying astrophysical phenomena invisible to the naked eye or standard optical wavelengths.

Advanced Research and LIDAR Applications

With its specialized design and infrared optimization, the IRDK14 is a robust platform for advanced scientific research, including LIDAR and other remote sensing applications.

Key Features Overview

The IRDK14 comes with impressive specifications tailored for infrared optimization:

• Gold-coated mirrors optimized for high reflectivity in infrared wavelengths (ultraviolet optimization available)
• 14-inch (356 mm) aperture
• 2563 mm focal length
• f/7.2 focal ratio
• 282mm back focus from mounting surface
• 70mm image circle
• Rock-solid fused silica mirrors with low thermal expansion
• Lightweight and rigid carbon fiber optical tube assembly

Optical Systems

Secondary Mirror

Primary Mirror

CDK24’s Key Features

Large Aperture and Moderate Focal Ratio

The CDK24 features a substantial 610 mm aperture and a moderate f/6.5 focal ratio. This setup enhances its capability to capture deep-sky objects with remarkable detail, providing excellent light-gathering efficiency and a broad field of view for research and imaging.

Advanced Optical Design

Equipped with a state-of-the-art Corrected Dall-Kirkham optical system, the CDK24 offers exceptional image clarity. Its design eliminates off-axis coma and astigmatism and delivers a perfectly flat field, ensuring images are sharp and detailed across the entire field of view with minimal post-processing adjustments.

Robust Mechanical Structure

Constructed with a carbon fiber optical tube, the CDK24 is lightweight and durable. Its thermal expansion coefficient ensures minimal focus shift as temperatures change, making it ideal for prolonged observing sessions under varying environmental conditions.

High-Performance Mirrors and Coatings

Utilizing fused silica mirrors, the CDK24 maintains precise optical alignment and surface accuracy, even with temperature fluctuations. Its high-quality coatings enhance light transmission and reduce stray light, optimizing performance for specialized observational tasks.

Thermal Management

The CDK24 is equipped with cooling fans and a Delta-T ready system to achieve thermal equilibrium swiftly. These features help to minimize air turbulence within the tube, thus reducing image distortion and maintaining consistent imaging quality.

Integrated Dew Control

The telescope incorporates advanced dew prevention technology with heater pads controlled by PlaneWave’s software. This ensures that optical surfaces remain clear of condensation during humid conditions, thus maintaining clear and consistent imaging performance.

Application-Specific Benefits

Astrophotography

With its large image circle and exquisite field flatness, the CDK24 allows astrophotographers to capture expansive and breathtaking views of the cosmos with incredible detail and clarity.

Astronomy Research

The precise and stable imaging capabilities of the CDK24 make it an invaluable tool for academic institutions and observatories engaged in complex astronomical research, including deep-sky surveys and detailed photometric studies.

Visual Observations

The CDK24 excels in visual observation, offering bright and crisp views ideal for star parties and serious visual astronomy. The telescope's large aperture and superior optical quality provide stunning views of planetary, lunar, and deep-sky objects, making every viewing session a remarkable experience.

Space Situational Awareness (SSA) and Space Domain Awareness (SDA)

The CDK24 also lend itself to applications in Space Situational Awareness and Space Domain Awareness. Its capability to provide detailed observations can be essential for tracking and monitoring satellites and other space debris, contributing valuable data for space traffic management and safety initiatives.

Optical Systems

Secondary Mirror

Lens Group

Primary Mirror

捕捉最令人惊叹的天文照片是我们团队所热衷的事情。从设计到制造，我们对校正 Dall-Kirkham (CDK) 20 英寸望远镜的目标都是围绕性能和易用性。Planewave CDK20 f/7.7 OTA 是望远镜技术的一次巨大突破，不会产生离轴彗形像差和离轴像散。此外，CDK20 提供完美平坦的视场，因此您的天文照片从图像的角落到角落都将具有令人惊叹的清晰度，而场曲率不会降低照片的质量。CDK20 是一款出色的衍射极限望远镜，它具有单镜准直的简便性、高级挡板的杂散光控制、通过有限元分析 (FEA) 创建的结构性能以及数十年的望远镜设计经验。 CDK20 用户在使用 16803 尺寸的大型相机传感器时，可以体验边缘到边缘的精确星点和 45 x 45 弧分的视野。当设备淡入背景并简单地发挥作用时，天文摄影体验变得更加有趣和有益！

PlaneWave CDK 14 英寸熔融石英

CDK（校正 Dall-Kirkham）光学设计是一种创新的解决方案，以实惠的价格提供无与伦比的天文成像质量。CDK 望远镜设计使用大尺寸 CCD 相机提供出色的成像效果，同时仍保持出色的视觉使用效果。CDK 设计的离轴性能远远超过大多数商用望远镜设计，包括 Ritchey-Chrétien 设计。

熔融石英

熔融石英是一种纯度最高的合成非晶态石英玻璃，也是最透明的玻璃之一。

由于纯度高，熔融石英的光学和热学性质优于其他类型的玻璃。其透射率和均匀性均超过结晶石英，且不存在结晶形式固有的温度不稳定问题。

熔融石英的热系数比硼硅酸盐玻璃低六倍，这意味着熔融石英在冷却时能够保持其形状，精度很高。这意味着在温度变化时，其光学性能始终如一，焦点也始终如一。

熔融石英具有较高的熔化温度（约 1,600 摄氏度）、极低的热膨胀系数和抗热冲击性，是专业天文台以及各种科学应用的首选材料。

这种毫不妥协的设计是独一无二的，它使光学对准变得容易，准直变得非常简单。这保证了用户从望远镜中获得最佳性能。CDK 设计的图像平面的最终结果是没有离轴彗差、没有离轴散光、完全平坦的视场（没有离轴散焦）。CDK 设计将让您从视场的中心到角落精确地找到星星。

有关我们的光学设计的更多信息

特征：

PlaneWave CDK 14 英寸熔融石英规格

光学系统

次镜

主镜

镜头组

标准功能

船运

注意：本产品的交货周期较长。如需更多信息，请联系education@bintel.com.au 。

PlaneWave CDK 12.5 熔融石英

捕捉最令人惊叹的天文照片是我们团队所热衷的事情。从设计到制造，我们对校正 Dall-Kirkham (CDK) 12.5 英寸望远镜的目标都是以性能和易用性为中心。PlaneWave CDK 12.5 熔融石英是望远镜技术的一次巨大突破，不会产生离轴彗差和离轴像散。此外，PlaneWave CDK 12.5 熔融石英可提供完美的平坦视场，因此您的天文照片从图像的角落到角落都将具有令人惊叹的清晰度，而场曲率不会降低照片的质量。CDK12.5 是一款出色的衍射极限望远镜，它具有单镜准直的简便性、高级挡板的杂散光控制、通过有限元分析 (FEA) 创建的结构性能以及数十年的望远镜设计经验。 CDK12.5 用户在使用大型相机传感器时可以体验到边缘到边缘的精确星点和 70 x 70 弧分的视野。当设备淡入背景并简单地发挥作用时，天文摄影体验变得更加有趣和有益！

PlaneWave CDK 12.5 熔融石英是一台 12.5 英寸（0.32 米）f/8 校正 Dall-Kirkham 天文望远镜。该望远镜有一个封闭的碳纤维管，3 个冷却风扇从望远镜后部排出空气。PlaneWave CDK 12.5 覆盖 52 毫米视野，没有任何场曲、离轴彗形像差或像散。该仪器重量为 21 公斤，标配大容量 2.75 英寸 Hedrick 调焦器。

技术

CDK光学设计

CDK望远镜 基于 Dave Rowe 开发的新光学设计。该设计的目标是制造一台价格合理的天文望远镜，其成像平面足够大，以充分利用当今的大画幅 CCD 相机。大多数望远镜图像在偏离轴时会因彗形像差、离轴像散或场曲而变差。CDK 设计不会出现这些问题。CDK无彗形像差、无离轴像散，且具有平坦的场。该设计是解决上述问题的简单而优雅的解决方案。CDK 由三个组件组成：一个椭圆主镜、一个球面副镜和一个透镜组。所有这些组件都经过优化，可以协同工作，从而在整个 52 毫米图像平面上创建出色的精确星点。

光学性能

图中显示了两个模拟，展示了 CDK 的惊人性能。第一个是衍射模拟，第二个是点图。在这两个模拟中，小方块都是 9×9 微米，大约是 CCD 像素的大小。在衍射模拟中，轴上和轴外的星像几乎相同。在轴外 21 毫米的点图中，光斑尺寸是令人难以置信的 6 微米 RMS 直径。这意味着 52 毫米像圈上的星星将是大气视宁度允许的最小的点。

这两种模拟都考虑了平面场，这更准确地表示了光学元件在平面 CCD 相机芯片上的表现。对于视觉使用，一定程度的场曲率是允许的，因为眼睛能够补偿弯曲的场。衍射模拟是在 585nm 处计算的。点图是在 720、585 和 430nm 处计算的。许多公司只显示一种波长的点图，但您无法仅用一种波长看到色度性能。

比较：CDK 与 Ritchey Chrétien

所示的模拟将 CDK 设计与 Ritchey Chrétien (RC) 设计的光学性能进行了比较。Ritchey 设计因在许多专业领域中的应用而成为天文成像望远镜的热门选择

天文台。尽管制造和校准非常困难且成本高昂，但 Ritchey 成功地消除了困扰许多其他设计的许多问题，即离轴彗形像差。然而，Ritchey 并没有消除离轴像散和场曲的破坏性影响。

CDK 设计通过将一对校正透镜集成到双镜设计中来解决离轴彗形像差问题。这种设计的妙处在于，它还可以校正像散和场曲。由于透镜距离焦平面相对较近（与各种施密特卡塞格林设计中的施密特校正板不同），并且由于这些透镜以双合透镜的形式协同工作，因此不存在色差。CDK 提供宽阔的无像差平坦视野，使用户能够充分利用当今市场上的超大成像芯片相机。

如果光学元件无法正确对准，那么无像差望远镜设计也毫无意义。许多 Ritchey 拥有者从未充分利用其仪器的性能，因为 Ritchey 很难校准。在 Ritchey 设计中，将双曲面副镜的光轴与主镜的光轴对准至关重要，而且公差非常大。CDK 设计的副镜是球面的。它没有光轴，因此 CDK 副镜的定心公差相对较大。借助一些非常简单的工具，CDK 用户将能够在几分钟内设置副镜间距、校准光学元件并开始享受该仪器提供的全部性能潜力。

CDK 和 RC 之间的性能差异非常明显。降低 RC 离轴性能的最大因素是由于场曲率导致的散焦。在 RC 制造商展示的许多图表中，这些图表看起来比这更好，因为它们显示的是弯曲的场。这对于视觉使用来说很好，因为眼睛可以补偿一定程度的场曲率。但 CCD 阵列是平坦的，因此为了评估性能，点图和/或衍射模拟需要如图所示的平坦场。

PlaneWave CDK 12.5 规格

光学系统

次镜

主镜

镜头组

船运

包含的配件

准直和间距说明

我们最大的折射望远镜 APO250VT F/8.8 让观察者沉浸在太空之美中。这款天文台级仪器提供了 TEC 所能提供的最佳视觉体验。

• APO250VT F/8.8 采用空气间隔复消色差三片物镜，中间元件为萤石 (CaF ₂ )，可实现针对视觉使用和成像优化的色彩校正。这种空气间隔三片物镜设计与物镜所有表面的多层涂层相结合，可确保最大程度的透光率。
• 物镜安装在钛合金容器内，具有出色的温度调节性能，同时重量轻且强度高。
• 光学组件位于一个轻质铝管中，该铝管的整个内部都采用了防反射涂层和锋利边缘的挡板，并且无需考虑准直——在望远镜离开 TEC 后，无需进行任何调整。
• 此外，干净利落的全白组装彰显了 TEC 一贯的优雅手工品质。这款紧凑而永恒的设计将带来深厚的对比度和丰富自然的色彩。
• 每台 APO250VT F/8.8 都配备了 Starlight Instruments FTF#3545 Feather Touch 调焦器，该调焦器是与 TEC 合作设计的。这是 Starlight Instruments 最大的旋转调焦器，具有粗调和微调 9:1 行星减速组件。
• 2 英寸锁定金属夹头对温度波动不敏感，并能以高精度和同心度保持负载。
• 包括精密可调节的管环。
• 能够容纳多种目镜。
• 建议与高容量负载支架和固定观察站配对。

TEC APO250VT F/8.8 具有经典的折射镜风格，设计毫不妥协，毫不花哨，让大自然的奇迹不言而喻。 请注意，所有价格和可用性如有变更，恕不另行通知

推荐配件

• 可调节燕尾板和半环。
• 10×60 Baader Vario 寻星镜，配有 TEC 寻星镜支架和用于望远镜安装的底座。
• 7×50 Vixen 寻星镜，配有TEC 寻星镜支架和用于望远镜安装的底座。
• Gutekunst 紧凑型大气色散校正器 (ADC)

测试和质量保证

TEC 望远镜经过严格测试，以确保顶级品质性能。整个玻璃生产过程中都使用牛顿环，然后我们使用干涉仪纠正任何剩余的缺陷。然后对每台望远镜进行严格测试，以达到最佳的斯特列尔比。请放心，您的望远镜已经过优化，光学性能尽可能完美。如果物镜没有达到 Yuri 的期望，望远镜将不会发货。作为一项严格政策，TEC 不会发布望远镜测试报告。

虽然物镜在干涉控制下经过微调以满足最高的光学标准，但物镜和镜筒组件中可能存在外观缺陷。请放心，望远镜中的任何缺陷均已确定不会影响光学性能。

APO140FL F/7 于 2017 年首次亮相，旨在向 TEC 最早的设计之一 APO140ED 致敬，并迅速成为 TEC 最受欢迎的型号。

• APO140FL F/7 采用油隔复消色差三片式物镜，中间元件为萤石 (CaF ₂ )，可实现针对视觉使用和成像优化的色彩校正。这种油隔三片式设计与物镜所有表面的多层涂层相结合，可确保最大程度的透光率。
• 物镜安装在铝制容器内，具有出色的温度调节性能，同时重量轻且坚固。
• 光学组件位于一个轻质铝管中，该铝管的整个内部都采用了防反射涂层和锋利边缘的挡板，并且无需考虑准直——在望远镜离开 TEC 后，无需进行任何调整。
• 此外，干净利落的全白组装彰显了 TEC 一贯的优雅手工品质。这款紧凑而永恒的设计将带来深厚的对比度和丰富自然的色彩。
• 每台 APO140FL F/7 都配备了 Starlight Instruments FTF#3545 Feather Touch 调焦器，该调焦器是与 TEC 合作设计的。这是 Starlight Instruments 最大的旋转调焦器，具有粗调和微调 9:1 行星减速组件。
  • APO140FL F/7 可应要求安装到其他调焦器型号。请联系 TEC 确认所需调焦器是否适合所需 TEC 型号。
• 2 英寸锁定金属夹头对温度波动不敏感，并能以高精度和同心度保持负载。
• 能够容纳多种目镜和支架。

TEC APO140FL F/7 采用经典折射镜设计，设计简洁，不折不扣，让大自然的奇观不言而喻。所有价格和供货情况如有变更，恕不另行通知

推荐配件；

• 精密可调管环
• 9 英寸燕尾板和手柄方便运输，并可与大多数支架无缝贴合。
• 焦距缩减校正器将 F/7 比率转换为 F/6.2，后焦距为 115 毫米。
• TEC运输箱可方便观察地点之间的运输。
• TEC 紧凑型箱，方便提起和运输。
• 10×60 Baader Vario 寻星镜，配有 TEC 寻星镜支架和用于望远镜安装的底座。
• 7×50 Vixen 寻星镜，配有TEC 寻星镜支架和用于望远镜安装的底座。
• Gutekunst 紧凑型大气色散校正器 (ADC)。

测试和质量保证

TEC 望远镜经过严格测试，以确保顶级品质性能。整个玻璃生产过程中都使用牛顿环，然后我们使用干涉仪纠正任何剩余的缺陷。然后对每台望远镜进行严格测试，以达到最佳的斯特列尔比。请放心，您的望远镜已经过优化，光学性能尽可能完美。如果物镜没有达到 Yuri 的期望，望远镜将不会发货。作为一项严格政策，TEC 不会发布望远镜测试报告。

虽然物镜在干涉控制下经过微调以满足最高的光学标准，但物镜和镜筒组件中可能存在外观缺陷。请放心，望远镜中的任何缺陷均已确定不会影响光学性能。

我们最大的便携式折射镜 APO180FL F/7 可以让观察者深入探索太空的美丽。

• APO180FL F/7 采用油隔复消色差三片式物镜，中间元件为萤石 (CaF ₂ )，可实现针对视觉使用和成像优化的色彩校正。这种油隔三片式设计与物镜所有表面的多层涂层相结合，可确保最大程度的透光率。
• 物镜安装在铝制容器内，具有出色的温度调节性能，同时重量轻且坚固。
• 光学组件位于一个轻质铝管中，该铝管的整个内部都采用了防反射涂层和锋利边缘的挡板，并且无需考虑准直——在望远镜离开 TEC 后，无需进行任何调整。
• 此外，干净利落的全白组装彰显了 TEC 一贯的优雅手工品质。这款紧凑而永恒的设计将带来深厚的对比度和丰富自然的色彩。
• 每台 APO180FL F/7 都配备了 Starlight Instruments FTF#3545 Feather Touch 调焦器，该调焦器是与 TEC 合作设计的。这是 Starlight Instruments 最大的旋转调焦器，具有粗调和微调 9:1 行星减速组件。
  • APO180FL F/7 可应要求安装到其他调焦器型号。请联系 TEC 确认所需调焦器是否适合所需的 TEC 型号
• 2 英寸锁定金属夹头对温度波动不敏感，并能以高精度和同心度保持负载。
• 它还配备了调焦轮，方便安装和定向。
• 可作为双筒望远镜购买。这需要购买 2 个 APO180FL F/7。
• 能够容纳多种目镜和支架。

TEC APO180FL F/7 是经典折射望远镜，设计简约，毫不妥协，让大自然的奇迹不言而喻。请注意，所有价格和供货情况均可能随时更改。

推荐配件；

• 12 英寸燕尾板和提手便于运输，可与大多数支架无缝贴合。更大的尺寸可轻松与我们更大的型号相匹配。
• 精密可调管环。
• 焦距缩减校正器将 F/7 比率转换为 F/6.2，后焦距为 115 毫米。
• 180mm 平场镜可防止渐晕并确保高质量成像。
• 10×60 Baader Vario 寻星镜，配有 TEC 寻星镜支架和用于望远镜安装的底座。
• 7×50 Vixen 寻星镜，配有TEC 寻星镜支架和用于望远镜安装的底座。
• Gutekunst 紧凑型大气色散校正器 (ADC)。

测试和质量保证

TEC 望远镜经过严格测试，以确保顶级品质性能。整个玻璃生产过程中都使用牛顿环，然后我们使用干涉仪纠正任何剩余的缺陷。然后对每台望远镜进行严格测试，以达到最佳的斯特列尔比。请放心，您的望远镜已经过优化，光学性能尽可能完美。如果物镜没有达到 Yuri 的期望，望远镜将不会发货。作为一项严格政策，TEC 不会发布望远镜测试报告。

虽然物镜在干涉控制下经过微调以满足最高的光学标准，但物镜和镜筒组件中可能存在外观缺陷。请放心，望远镜中的任何缺陷均已确定不会影响光学性能。

APO160FL F/7 是广受欢迎的 APO140FL 的延伸，它可以让观察者更深入地探索太空的美丽。

• TEC APO160FL F/7 采用油隔复消色差三片式物镜，中间元件为萤石 (CaF ₂ )，可实现针对视觉使用和成像优化的色彩校正。这种油隔三片式设计与物镜所有表面的多层涂层相结合，可确保最大程度的透光率。
• 物镜安装在铝制容器内，具有出色的温度调节性能，同时重量轻且坚固。
• 光学组件位于一个轻质铝管中，该铝管的整个内部都采用了防反射涂层和锋利边缘的挡板，并且无需考虑准直——在望远镜离开 TEC 后，无需进行任何调整。
• 此外，干净利落的全白组装彰显了 TEC 一贯的优雅手工品质。这款紧凑而永恒的设计将带来深厚的对比度和丰富自然的色彩。
• 每台 APO160FL F/7 都配备了 Starlight Instruments FTF#3545 Feather Touch 调焦器，该调焦器是与 TEC 合作设计的。这是 Starlight Instruments 最大的旋转调焦器，具有粗调和微调 9:1 行星减速组件。
  • APO160FL F/7 可应要求安装到其他调焦器型号。请联系 TEC 确认所需调焦器是否适合所需 TEC 型号。
• 2 英寸锁定金属夹头对温度波动不敏感，并能以高精度和同心度保持负载。
• 它还配备了调焦轮，方便安装和定向。
• 可作为双筒望远镜购买。这需要购买 2 个 APO160FL F/7。
• 能够容纳多种目镜和支架。

TEC APO160FL F/7 采用经典折射镜风格，设计毫不妥协，毫不花哨，让大自然的奇迹不言而喻。

请注意，所有价格和可用性如有变更，恕不另行通知

推荐配件；

• 精密可调管环
• 12 英寸燕尾板和提手便于运输，可与大多数支架无缝贴合。更大的尺寸可轻松与我们更大的型号相匹配。
• 焦距缩减校正器将 F/7 比率转换为 F/6.2，后焦距为 115 毫米。
• 160mm 平场镜，具有 85mm 后焦距。
• 10×60 Baader Vario 寻星镜，配有 TEC 寻星镜支架和用于望远镜安装的底座。
• 7×50 Vixen 寻星镜，配有TEC 寻星镜支架和用于望远镜安装的底座。
• Gutekunst 紧凑型大气色散校正器 (ADC)。

测试和质量保证

TEC 望远镜经过严格测试，以确保顶级品质性能。整个玻璃生产过程中都使用牛顿环，然后我们使用干涉仪纠正任何剩余的缺陷。然后对每台望远镜进行严格测试，以达到最佳的斯特列尔比。请放心，您的望远镜已经过优化，光学性能尽可能完美。如果物镜没有达到 Yuri 的期望，望远镜将不会发货。作为一项严格政策，TEC 不会发布望远镜测试报告。

虽然物镜在干涉控制下经过微调以满足最高的光学标准，但物镜和镜筒组件中可能存在外观缺陷。请放心，望远镜中的任何缺陷均已确定不会影响光学性能。

New Sky-Watcher 80EDX APO Telescope - redesigned body with famous Esprit optics

**Have a chat with us about availability**

Highlights:

• Air Spaced 80mm Apochromatic Triplet (APO)
• FPL-53 extra low dispersion glass
• Zero detectable colour fringing even on bright objects
• Diffraction limited optics
• Fully multi coated lenses
• 3″ CNC machined 11:1 dual speed linear power focuser – rotatable
• Indexed focuser tube
• Knife-edge baffled system to enhance contrast

The Sky-Watcher 80mm Esprit 80EDX Triplet APO Refractor is a highly portable instrument, while still having the imaging capabilities to deliver deep-sky astro photos of stunning quality. It's especially suited for those seeking wide field images and visual observations. 

The air spaced apochromatic triplet lenses use the remarkable Ohara FPL-53 ED (extra low dispersion) glass, with exceptional colour correction over the entire visible spectrum there is no chromatic aberration even on bright objects! Knife edge baffles reduce internal reflections and increase contrast, helping to bring out faint structure in deep sky objects.

A 2-element field flattener is available separately to iron out the natural off-axis astigmatism and field curvature of the objective lens, leaving a fully corrected 42mm field of view.

In The Box:

• 80/400 Apochromatic Refractor
• Rotatable focuser adapter
• Collapsible Dew Shield
• 2″ Dielectric Star Diagonal
• 9×50 Right Angled Erect Image Diagonal
• D Style dovetail Bar
• 2″ to 1.25″ Eyepiece Adaptor
• Aluminium Foam-Lined Case

SPECIFICATIONS

New Sky-Watcher 120DX APO Telescope - redesigned body with famous Esprit optics

**Due in late July/August**

Highlights:

• Air Spaced 120mm Apochromatic Triplet
• FPL-53 extra low dispersion glass
• Zero detectable colour fringing even on bright objects
• Diffraction limited optics
• Fully multi coated lenses
• 3″ CNC machined 11:1 dual speed linear power focuser – rotatable
• Indexed focuser tube
• Knife-edge baffled system to enhance contrast

The Sky-Watcher 120mm Esprit 120ED Triplet APO Refractor is a high-end yet portable instrument for astro-photographers seeking quality images that only a telescope of this size and optical design can produce. It's also ideal for extended visual observations of deep-space objects due to its remarkable contrast and light gathering ability.

The air spaced apochromatic triplet lenses use the remarkable Ohara FPL-53 ED (extra low dispersion) glass, with exceptional colour correction over the entire visible spectrum there is no chromatic aberration even on bright objects! Knife edge baffles reduce internal reflections and increase contrast, helping to bring out faint structure in deep sky objects.

Designed with photography in mind, it sits on two tracks above and below the barrel to prevent flexure with a heavy camera attached, and is fully rotatable to perfectly frame a target on the sensor.

In The Box:

• 120/840 Apochromatic Refractor
• Fixed Dew Shield
• 2″ Dielectric Star Diagonal
• 9×50 Right Angled Erect Image Diagonal
• D Style dovetail Bar
• 2″ to 1.25″ Eyepiece Adaptor
• Aluminium Foam-Lined Case

SPECIFICATIONS

New Sky-Watcher 100EDX APO Telescope - redesigned body with famous Esprit optics

Highlights:

• Air Spaced 100mm Apochromatic Triplet (APO)
• FPL-53 extra low dispersion glass
• Zero detectable colour fringing even on bright objects
• Diffraction limited optics
• Fully multi coated lenses
• 3″ CNC machined 11:1 dual speed linear power focuser – rotatable
• Indexed focuser tube
• Knife-edge baffled system to enhance contrast

The Sky-Watcher 100mm Esprit 1000EDX Triplet APO Refractor is a high-end instrument for astro-photographers seeking quality images, yet also need a telescope that can be easily transported.

The air spaced apochromatic triplet lenses use the remarkable Ohara FPL-53 ED (extra low dispersion) glass, with exceptional colour correction over the entire visible spectrum there is no chromatic aberration even on bright objects! Knife edge baffles reduce internal reflections and increase contrast, helping to bring out faint structure in deep sky objects.

A 2-element field flattener is available separately to iron out the natural off-axis astigmatism and field curvature of the objective lens, leaving a fully corrected 42mm field of view.

In The Box:

• 100/550 Apochromatic Refractor
• Fixed Dew Shield
• 2″ Dielectric Star Diagonal
• 9×50 Right Angled Erect Image Diagonal
• D Style dovetail Bar
• 2″ to 1.25″ Eyepiece Adaptor
• Aluminium Foam-Lined Case

SPECIFICATIONS

Designed in Japan, Made in Taiwan 

Sharp Optical System & Performance

• Superb ED class for remarkable image clarity. Crystal clear, superb sharp, almost zero aberration and distortion.
• 2 ED Glasses S-FPL 53 & S-FPL 51 & Lanthanum - Fully Separated Triplet (FST)  
  Fully Multi-coated optics ensures maximum light transmission
• Impressive user experience, designed for both visual observation and astrophotography

Precision focusing & mechanical design throughout

• Finely CNC machining aluminium body and patented rack and pinion focuser for heavy loading 360 degree rotatable for photography
• Deluxe high-glossy anodizing finish
• Retractable sunshade
• PATENTED：US 8,693,092 B2 / Taiwan 1417570
  

Design

At the heart of the Founder Optics FOT86 is premium performance 3-element ED APO triplet refractor, designed by a famous optical designer in based in Japan. The optical performance is impressive as a two ED glass elements are employed.

Unlike most ED triplet telescopes which use only 1 ED glass element, Founder Optics adopted 2 ED glass of S-FPL 53 and S-FPL 51 to bring a remarkable image that you'll immediately spot with even a casual viewing. With two fluoro-crown ED glass elements and fully multi-coated optics, these Founder Optics refractors provide a crystal clear, superb sharp, zero aberration and distortion image to your eyes or camera sensor.

In addition, each element is fully separated or air spaced which is not common even among APO triplet telescopes. This offers further improvements to the already impressive optical quality. 

Quality

In order to complete this unique design, it requires a very high level machining and assembly capability. Founder Optics partner with an experienced factory located in Taiwan with over 50 years experience in precision manufacturing, especially for Japanese companies. 

Besides manufacturing know-how, the high standard of quality control is also crucial to producing FOT86 and FOT106 telescopes. This is recorded in a Quality Certification Card.

Every unit is thoroughly tested, and these unique records help customers understand the quality of their telescope. Founder Optics take their quality checking very seriously as they aim to offer the best triplet APO telescopes to BINTEL customers. 

Focuser - 2'' Rack & Pinion

Perfect Hybrid Drive system with 8 Ball bearings- More Smoothly!

2sets of 4pcs ball bearing at 2 sides between the drawtube and the focuser handle linear travel of the focuser. Once the locked the knob, there is no gap among the drawtube, 8pcs ball bearings, and the focuser cover. It does not only keep the focuser always paralleled the optic axis, but also keep it moved very smoothly.

Dual Speed Focuser- 1:11 – Extremely Accurate!

Smooth focus motion and fine focus wheel allow precision adjustment from critical focusing of eyepiece or camera.

Unique Lock Function–  Heavy Loading Capability!

Special lock grabs the rack& pinion & drawtube in two directions. The design makes the focuser always paralleled the optics axis. Instead of pushing against the drawtube to eliminate focus shift while it’s focused. And it can handle up to 8kg as well for complex imaging trains.

Longer Traveling Distance– Suitable for a range of Photographing Accessories!

Unlike other focusers, the long travel 95mm provides more room for adjust for fine and accurate focus.  

It is compatibly for a wide range of photographic accessories, along with easy to use controls.  

Solid, lockable Dew Shield

Built in sliding dew shield.  Three screws hold dew shield stable while imaging or observing while keeping it place during transport. 

Specifications:

Optical System: 2 ED APO Triplet (Fully Separated Elements)

Clear Aperture: 86mm

Focal Length: 560mm

Image Circle (with Field Flattener): Ø44mm

Focuser: 2’’ Rack & Pinion Patented Focuser (Twist Lock)

Weight: OTA: 3.5kg/ with Tube Ring: 4.6kg

Diameter of Main Tube: 90mm

Tube Length: Fully Retracted: 456mm/ Fully Extended: 545mm

What's in the Box:

1)  High Quality Aluminium Case with Key
2)  FOT106/ FOT86 with Patent Rack & Pinion Focuser
3)  1.25’’/ 2’’ Twist Lock Adapter
4)  Crank Handle with 1pc 1/4"-20 Hexagon Screw
5)  Tube Rings with 4pcs Dovetail Screws
6)  Star Finder Shoe
7)  Field Flattener (M42) with Exchangeable M48 Adapter
8)  7’’ Vixen Type Mount Dovetail
9)  Quality Certification Card with Serial Number
10) Cleaning Cloth
11) Dust Caps (for Objective Lens)

Instruction FOT86 Manual 

Download here

Rowe-Ackermann Schmidt 天文照相仪 (Celestron RASA 36) 是一种经济高效的光学系统，可用于太空监视、太空态势感知 (SSA)、其他科学应用以及先进的广角天文成像。它在光圈、速度、视场和光学性能方面具有前所未有的价值。RASA 设计具有方便的外部主焦点图像捕获位置和平坦的焦平面，可为广角边缘提供小光斑尺寸。结果是图像没有场曲、离轴彗差和像散等光学缺陷。

36 厘米口径版本是 RASA Celestron 制造的最大口径版本；它是同类现成光学仪器中最大、速度最快（f/2.2）的。与大多数仅聚焦可见光（400-700 纳米）的望远镜不同，RASA 36 厘米聚焦的光谱范围更广（400-900 纳米），从而使相机传感器能够检测到更亮的信号。RASA 36 厘米还具有重新设计的对焦系统，可确保轻松、稳定的对焦。

RASA 36 c 样品后焦距（77.5 毫米）可适应各种成像传感器。可添加定制相机适配器，视野可达 4.4 度。

重要的货运要求RASA 36 是一款专业级高精度仪器。它按照严格的标准制造和校准，以提供卓越的光学性能。望远镜已包装好，以确保其在运输过程中保持校准和性能。然而，由于重量、尺寸和通过包裹服务运输的已知压力，Celestron 已确定理想的运输方式是通过 LTL 卡车货运进行托盘运输。对于所有澳大利亚交付，Celestron 将通过这种方式发货。请联系我们以了解更多运费

Celestron C14-AF XLT 光学管组件

• 14" 施密特-卡塞格伦光管组件
• 铝光学管
• 兼容 Fastar
• Celestron 的优质 StarBright XLT 涂层
• 焦距 3910 毫米 (f/11)
• 附赠 40 毫米 1.25 英寸目镜 (98x)
• 可视背面允许使用 2 英寸配件
• 9x50 寻星镜帮助准确找到物体
• 2 英寸的镜子对角线可在观察高空物体时提供更舒适的观看位置
• 包括与 CGE 安装座兼容的燕尾导轨

规格