The Celestron T-Adapter-Barlow Lens Universal - 1.25'' can be used three ways; as a 2X Barlow for visual use, as a prime focus T-adapter, or as a “Barlowed” T-adapter to double the magnification.

Features:

1. As a 2X Barlow right out of the box. Insert any 1.25” eyepiece into the adapter to double the magnification, while retaining a comfortable eye relief of your eyepiece.
2. For prime focus photography. Unscrew the bottom section (glass element) to remove the Barlow and slide the chrome barrel into the telescope’s 1.25” focuser. Screw a T-Ring to the T Thread on top of the adapter. Attach to your DSLR or SLR camera.
3. As a barlowed T-adapter simply screw your T-Ring (sold separately) directly to the T-Thread and place into focuser. Good for imaging Planets to enlarge image.

Please note that some telescopes, especially “fast” refractors and Newtonians, may not have enough focus travel to allow the photographic image to come to focus when used in prime focus mode. In these instances, adding the Barlow to the T-Adapter will allow the telescope to reach focus.

In “Tele-Extended” mode, the Barlow doubles the focal length and f/ratio of your telescope, resulting in an image on the sensor or film plane that is twice the size of a prime focus image.

Prime focus and tele-extended photography are popular for short exposure images of terrestrial objects as well as celestial objects like the Moon.

Weight = 68 grams;

Length = 74mm;

Made in China.

Two-year manufacturer limited warranty.

• Tele Vue T-Ring Adapter - PTR-1250 replaces the eyepiece holder on the 1.25" 2.5x and 5x Tele Vue Powermate Barlows.
• Threads directly onto the chrome barrel in place of the eyepiece holder.
• Tele Vue T-Ring Adapter - PTR-1250 is suited for photography with short focal length refractors capable of using 1.25" visual accessories.
• Allows for the attachment of a CCD camera.

TeleVue T-Ring Adapter - PTR-2200 replaces the eyepiece holder on the 2" 2x Televue Powermate Barlow.

Top of eyepiece screws off and is replaced by the PTR-2200

Threads directly onto the chrome barrel in place of the eyepiece holder.

TeleVue T-Ring Adapter - PTR-2200 is suited for photography with short focal length refractors capable of using 2" visual accessories.

Allows for the attachment of a CCD camera.

Tele Vue 4x Powermate T-Ring Adapter

TeleVue's 4x Powermate T-Ring adapter allows you to unscrew the standard eyepiece fitting of your powermate. With the T-ring adapter installed you have a secure and much more compact connection between your camera and 4x Powermate. It also guarantees perfect camera sensor alignment, a very important consideration when imaging with such high amplification.

Imaging the Solar System with Powermates™

Some of the finest Solar System images have been made with Powermates™. Used singly or stacked, Powermates™ help any scope achieve the long focal-length required to image details on Solar System bodies. The increased image scale allows for imaging without an intervening eyepiece. Powermate T-Ring Adapters fit on the Powermate lens assemblies to allow attachment of your camera's T-Ring or other T-threaded imaging accessory.

Powermate Magnification Chart for Imagers

The above chart indicates the magnification for each Powermate™ as a function of distance from the Powermate™ top surface to the imaging surface. Using the 4x Powermate T-Ring adapter will produce a magnification factor right on the nominated 4x amplification intended.

https://www.youtube.com/watch?v=5wWKjpDR4J8

When inserted between the eyepiece and telescope, this X-Cel 2X Barlow lens doubles the magnification of all your 1.25” eyepieces. The premium apochromatic optics yield high contrast, sharp images, virtually free of false colour.

The black anodized housing with orange highlights matches the eyepieces in the Celestron X-Cel LX line. A centralised rubber grip helps to keep your hands securely on the barrel, even when your fingers are cold or you are wearing gloves. A brass compression ring just inside the top of the X-Cel Barlow grabs your eyepiece gently but firmly when you turn the thumbscrew. Once the thumbscrew has been secured in place, the brass ring keeps your eyepiece in the Barlow instead of relying on the tip of the thumbscrew itself, offering a better grip and protecting the barrel from scratches.

The barrel of the Celestron X-Cel LX 2x Barlow is threaded to accept 1.25” filters, allowing you to change eyepieces without removing and re-attaching the filter from each eyepiece barrel.

The Celestron 2” Luminos Barlow Lens increases the magnification of your 2” and 1.25” eyepieces by 2.5x. The premium 4-element apochromatic optics are fully multi-coated for optimum light transmission and yield high contrast, true colour images.

The beautiful hard-anodized aluminum housing matches the eyepieces in the Celestron Luminos line. A centralized rubber grip helps to keep your hands securely on the barrel, even when your fingers are cold or you are wearing gloves. A brass compression ring just inside the top of the Luminos 2.5x Barlow grabs your 2” eyepieces gently but firmly when you turn the oversized thumbscrew. Once the thumbscrew has been secured in place, the brass ring keeps your eyepiece in the Barlow instead of relying on the tip of the thumbscrew itself, offering a better grip and protecting the barrel from scratches. A matching 2” to 1.25” adapter is included so that you can increase the magnification of all of your eyepieces, both 1.25” and 2”, in this versatile Barlow lens.

The insert barrel of the Celestron Luminos 2.5x Barlow is threaded to accept 2” filters. This is a nice feature, because you can change eyepieces without removing and reattaching the filter each time.

The Sky-Watcher 2-Inch NOMAD 2 2x Tele-Centric Focal Extender is a high-quality optical accessory with a variety of uses and connecting options for visual and imaging use.

VISUAL USE: Used as a Barlow Lens with an eyepiece for visual use, it effectively multiplies the magnification of any eyepiece by five times, allowing for detailed observations of celestial objects such as the Moon and planetary surfaces. Constructed with premium high-index glass elements and multi coatings, it ensures minimal light loss and maximum clarity. Features a self-centering brass compression ring which avoids marring to eyepieces and a captive eyepiece retaining screw.

IMAGING USES: The premium 4-lens design provides images without colour difference as well as providing excellent field collimation. It is ideal for taking spectacular high resolution photos of planetary surfaces or the surface of the Moon without compromising the quality of the telescope. So in other words it will maintain the apochromatic performance of an ED Apo telescope!! A CCD camera can be mounted directly using the supplied CCD adaptor. A DSLR camera can be mounted with the supplied DSLR adapter (camera M48x0.75 ring required).

The NOMAD 2 will be a very useful addition to the toolkit of many an astronomer !

FEATURES

• 2x Magnification
• 4-Element optical design
• Brass, self-centering compression ring to protect your eyepieces from marring
• Proprietary tuned full multi-coatings & high index glass
• Blackened lens edges & Anti-reflective threads
• Compatible with 2″ & 1.25″ Eyepieces (1.25″ Eyepiece adaptor included)
• CCD Adaptor supplied
• DSLR Camera Adaptor supplied (M48x0.75). M48 ring for DSLR required.
• Captive lock screws that can’t fall out
• 2″ (50.8mm) Barrel, Threaded for 2″ filters
• Safety undercut in nosepiece barrel for extra locking security
• Metal body construction

The Sky-Watcher 2-Inch NOMAD 4 4x Tele-Centric Focal Extender is a high-quality optical accessory with a variety of uses and connecting options for visual and imaging use.

VISUAL USE: Used as a Barlow Lens with an eyepiece for visual use, NOMAD 4 effectively multiplies the magnification of any eyepiece by five times, allowing for detailed observations of celestial objects such as the Moon and planetary surfaces. Constructed with premium high-index glass elements and multi coatings, it ensures minimal light loss and maximum clarity. Features a self-centering brass compression ring which avoids marring to eyepieces and a captive eyepiece retaining screw.

IMAGING USES: The premium 4-lens design provides images without colour difference as well as providing excellent field collimation. NOMAD 4 is ideal for taking spectacular high resolution photos of planetary surfaces or the surface of the Moon without compromising the quality of the telescope. So in other words it will maintain the apochromatic performance of an ED Apo telescope!! A CCD camera can be mounted directly using the supplied CCD adaptor. A DSLR camera can be mounted with the supplied DSLR adapter (camera M48x0.75 ring required).

The NOMAD 4 will be a very useful addition to the toolkit of many an astronomer !

FEATURES

• 4x Magnification
• 4-Element optical design
• Brass, self-centering compression ring to protect your eyepieces from marring
• Proprietary tuned full multi-coatings & high index glass
• Blackened lens edges & Anti-reflective threads
• Compatible with 2″ & 1.25″ Eyepieces (1.25″ Eyepiece adaptor included)
• CCD Adaptor supplied
• DSLR Camera Adaptor supplied (M48x0.75). M48 ring for DSLR required.
• Captive lock screws that can’t fall out
• 2″ (50.8mm) Barrel, Threaded for 2″ filters
• Safety undercut in nosepiece barrel for extra locking security
• Metal body construction

Vixen's Erect Image Adapter is designed to fit a 1.25" focuser. This straight through adapter will re-invert and flip the image so it will appear fully corrected. You will see images with the right side up and read right correct. This Image Adapter is a must have for those terrestrial viewers. Usable on both reflectors and refractors. Coated Optics

Specifications