Colour eyepiece filters are essential for observing the moon and planets. They effectively reduce glare and light scattering, improve contrast through selective filtration, and enhance definition and resolution.

Bintel's filters are constructed with top-notch, uniform glass and are coated to minimize reflections and ghosting. They are threaded to fit 1.25" eyepieces and provide a generous 26mm clear aperture.

#12 Yellow Filter

The #12 yellow filter enhances Jupiter’s cloud bands, particularly the lighter zones and the Great Red Spot, improves Mars' surface details, such as polar ice caps and dust storms, and sharpens contrast on the Moon, highlighting the maria and highlands.

#15A Dark Yellow Filter

The #15A dark yellow filter improves contrast on Jupiter's cloud belts, especially in the darker equatorial regions and the Great Red Spot, reveals surface features on Mars such as ridges and valleys, and enhances the details of lunar craters and shadows along the terminator.

#21 Orange Filter

The #21 orange filter helps define the atmospheric cloud structures on Jupiter and Saturn, enhancing features like the Great Red Spot and Saturn’s cloud bands, sharpens the visibility of Mars’ dust storms and polar ice caps, and brings out lunar surface details, particularly in shadowed areas.

#23A Light Red Filter

The #23A light red filter enhances the contrast of surface features on Mars, such as ice caps, dust storms, and topography, improves the visibility of Jupiter’s cloud belts and storms like the Great Red Spot, and highlights the Moon’s surface features along the terminator, including craters and maria.

#29 Dark Red Filter

The #29 dark red filter significantly enhances the contrast of Mars’ surface features like its ice caps, dust storms, and valleys, brings out darker regions and bands in Jupiter's atmosphere, and improves lunar contrast, especially in low-light areas and the terminator.

#38A Dark Blue Filter

The #38A dark blue filter enhances Jupiter’s cloud details, especially the lighter and darker zones and the Great Red Spot, improves the visibility of cloud layers on Saturn, and helps to bring out surface features such as the polar ice caps as well as dust storms on Mars by enhancing atmospheric contrasts.

#47 Violet Filter

The #47 violet filter brings out atmospheric features on Jupiter, such as cloud bands and storm systems, enhances the visibility of cloud layers on Saturn, and improves the contrast of Venus' upper atmosphere, revealing subtle cloud structures and atmospheric patterns.

#58A Dark Green Filter

The #58A dark green filter increases contrast in Jupiter’s cloud bands and atmospheric details, such as the Great Red Spot and polar regions, enhances Saturn’s ring details and cloud structures, improves the visibility of Mars’ surface features like polar ice caps and dust storms, and sharpens Venus’ cloud patterns.

TMB Pro Series UV/IR Cut Imaging Filter

The TMB Pro Series UV/IR Cut Imaging Filter is designed to block ultraviolet (UV) and infrared (IR) light, allowing only visible wavelengths to reach your camera sensor. Most telescope optics are optimised for visible light, so blocking UV and IR helps produce sharper, more accurate images with improved contrast and detail.

This filter is ideal for colour CMOS and CCD cameras, and can also be used with monochrome cameras. In addition, it serves as a protective barrier for your imaging equipment, reducing the risk of dust settling on your optics during long exposure sessions.

With its robust optical design and high-quality coatings, the TMB Pro Series UV/IR Cut Filter ensures maximum light transmission in the visible spectrum while minimising unwanted wavelengths, making it a simple but essential tool for astrophotography.

TMB Pro Series Duo-Band Nebula Imaging Filter

The TMB Pro Series Duo-Band Nebula Imaging Filter is designed for astrophotographers using colour cameras who want to capture emission nebulae in stunning detail without investing in a full mono camera setup. This dual-band filter works by letting through only two specific colours of light, Hα (656 nm) and OIII (500 nm), which are the wavelengths most emitted by many nebulae. By blocking most other light, including light pollution and moonlight, it makes faint nebulae stand out more clearly in your images. It works especially well on well-known targets such as the Orion Nebula, Carina Nebula, Lagoon Nebula, and Trifid Nebula, but will also enhance contrast on virtually any emission nebula across the sky.

Ideal for One-Shot Colour (OSC) cameras, the filter provides an easy way to explore narrowband imaging while retaining natural colour. Its precision optical design features finely polished Schott glass, double-sided anti-reflection coatings, and a robust anodised aluminium cell, ensuring excellent light transmission, minimal reflections, and long-term durability.

Available in standard 1.25” and 2” sizes, the TMB Pro Series Duo-Band Filter is compatible with almost all standard colour cameras and filter wheels, making it a practical solution for deep sky imaging in urban or light-polluted environments.

Key Features:

• Dual bandpass for Hα (656 nm) and OIII (500 nm)

• Enhances contrast of emission nebulae

• Reduces interference from moonlight and artificial light pollution

• High-quality Schott glass with anti-reflection coatings

• Robust CNC-machined anodised aluminium cell with laser-engraved markings

• Standard 1.25” or 2” sizing for wide compatibility

From the start, the Astronomik OIII filter has been very specifically designed for the visual observation of gaseous and planetary nebulae. The extremely narrow pass band of the two OIII lines brings a substantial contrast gain to these lines even under best observation conditions. On faint super nova remnants and faint planetary nebulae the Astronomik OIII filter will often make the difference as to whether the object can bee seen or not!

The optimal aperture ratio for the use of the filter is 1:3.7 to 1:15 with apertures of more than 6" (150mm). Transmission losses and chromatic distortions, which arise with other filters, occur with Astronomik OIII filters only when extremely bright aperture ratios of 1:3 and more come into play. The Astronomik OIII filters thus can expand the view of dispersed objects, generally speaking, to the whole visual field of view of the eyepiece and are not limited to only the center of the eyepiece.

Main use

Since enough light must be available to make use of the OIII filter it is best to use this filter with apertures of more than 6" (150mm). Smaller instruments do not gather enough light for meaningful and satisfying astronomical work. However, please note: Many experienced Deep Sky observers, with apertures of more than 10" (250mm), prefer using the OIII filter instead of the more versatile UHC filter. Due to the high optical quality of the Astronomik OIII filter substrate you will see the same needle-sharp stars as you would from your regular telescope.