Eyepiece Accessories and Filters

Find out more about the Celestron Moon Filter

Celestron's Moon Filter is an economical eyepiece filter for reducing the brightness of the moon and improving contrast, so greater detail can be observed on the lunar surface. The clear aperture is 21mm and the transmission is about 18%. Screws on to the filter thread of any Celestron, or other manufacturer's 1.25 inch eyepiece.

Find out more about the Sky-Watcher Moon Filter

Improves contrast and reduces glare on Lunar images. Item screws into 1.25" threaded eyepieces.

Find out more about the Optical Vision 1.25 Inch Light Pollution Filter

The Sky-Watcher 1.25 Inch Light Pollution Filter is a contrast-enhancing anodised aluminium, optical glass filter designed to block out the wavelengths of light emitted by mercury-vapour light and other common causes of light pollution, whilst providing higher transmission at critical hydrogen-alpha and hydrogen-beta lines than competing filters. Bright, light-polluted skies appear much darker, ...

Find out more about the Baader Hyperion Eyepiece T-Adapter (M43/T-2)

The Baader Hyperion Eyepiece T-Adapter enables you to attach cameras fitted with T-rings to Baader Hyperion eyepieces for eyepiece projection photography. It is suitable for use with Baader eyepieces with a 43mm thread - such as Hyperion fixed focal length eyepieces and the Mk III 8-24mm zoom eyepiece (but not the Mk II zoom eyepiece) - attaching to the thread and converting it to a T-2 type, ...

Find out more about the Baader Contrast Booster Filter

The Baader contrast filter booster will help sharpen up your stellar images, boosting contrast, emphasising lunar, Martian and Jovian surface details and cutting down on visible light pollution. The filter is especially useful in economy refractor telescopes, where it can aid in the correction of colour aberration.

Find out more about the Optical Vision 2 Inch Light Pollution Filter

The Sky-Watcher 2 Inch Light Pollution Filter is a contrast-enhancing anodised aluminium, optical glass filter designed to block out the wavelengths of light emitted by mercury-vapour light and other common causes of light pollution, whilst providing higher transmission at critical hydrogen-alpha and hydrogen-beta lines than competing filters. Bright, light-polluted skies appear much darker, and ...

Find out more about the Baader Neodymium + IR Cut-Off (Moon + Skyglow)

The Baader Neodymium + IR Cut-Off (Moon + Skyglow) filter drastically improves contrast for all reflector telescopes, without loss of brightness. The filter greatly intensifies surface details on Mars, Jupiter and Moon and enhances many deep sky galaxies and nebulae against the background sky. The Neodymium element greatly reduces glare and unwanted street light emissions without reducing ...

Find out more about the Optical Vision 1.25 Inch O-III Narrowband Filter

The Sky-Watcher 1.25 Inch O-III Narrowband Filter narrowband filter is specially designed for the observation of gas and planetary nebulae. It distinguishes different contrasts of the wavelengths of light that pass through, giving ideal conditions for the observation of faint super nova remnants and planetary remnants.

Find out more about the Sky-Watcher Coma Corrector for Newtonian Reflectors

This Sky-Watcher Coma Corrector is optimised for all Sky-Watcher fast-ratio f/5 Newtonian Reflectors / Dobsonians, with 2” focuser. Delivers stunning wide-field views with pinpoint stars to the edge of the field. Magnification remains unaltered. Supplied complete with necessary adaptors for visual use. For imaging use with a DSLR camera, a suitable M48x0.75 adaptor is required to match your ...

Find out more about the Optical Vision 5 Position Filter Wheel

This handy, time-saving device is a must-have for astronomers, for both visual and photographic use. Up to five filters can be installed in the threaded, numbered compartments, and each can be selected for your eyepiece or camera by simply rotating the inner wheel to any of the five click-stop positions. One compartment can be left empty for unfiltered viewing.

Find out more about the Baader AstroSolar Telescope Filter 120mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Celestron Reducer / Corrector f/6.3

This combination focal reducer and field corrector lens makes it possible to have a dual focal ratio instrument, without sacrificing image quality.If offers wide fields of view with any Schmidt-Cassegrain telescope and when used for astrophotography, it reduces exposure time by a factor of 3.

Find out more about the Olympus EP-16 Large Eyecup for OM-D E-M5 Mark II

The Olympus EP-16 is a spare or replacement large rubber eyecup for the Olympus E-M5 Mark II and E-M10 Mark II compact system cameras. As well as offering protection, the EP-16 eyecup adds additional comfort when looking through the viewfinder and helps to block stray light.

Find out more about the Baader AstroSolar Spotter Filter 65mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Baader AstroSolar Telescope Filter 80mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Baader Hyperion Finetuning-Ring 28mm

The Baader Hyperion 28mm Finetuning-Ring will allow you to easily change the focal length of your Hyperion eyepiece. The finetuning-ring has an outside diameter of 2” and is equipped with a male M48 thread on one end and a female M48 thread on the other. The ring simply attaches to the ring between the front negative element and the main body of the Hyperion eyepiece (not included) and this ...

Find out more about the Baader 6 Colour Filter Set

The 1.25" Baader 6 Colour Filter Set comprises three longpass and three genuine bandpass filters, which act similar to a nebula filter, so that only a small portion of the visual spectrum is transmitted to emphasise certain planetary surface detail. All filters have standard 31.7mm eyepiece filter threads. The set consists of the following colours: dark blue, bright blue, green, yellow, orange ...

Find out more about the Altair Lightwave 12mm Premium Long Eye Relief

The Altair Lightwave 12mm Premium Long Eye Relief features a flat, well corrected and wide 68 degrees apparent field of view. The user can enjoy expansive views of the Moon, planets and deep sky objects thanks to the 12mm focal length of the eyepiece. This is a very comfortable piece of equipment and the 20mm long eye relief allows the user to position their eye 20mm from the eyepiece lens. This ...

Find out more about the Baader AstroSolar Spotter Filter 130mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Optical Vision 1.25 Inch Variable Polarising Filter

The Optical Vision 1.25 Inch Variable Polarising Filter is a high quality anodised aluminium, optical glass variable polarising filter designed to reduce the amount of light entering your eyepiece. You can progressively dim the view when observing a bright object, such as the Moon or certain planets, to a level according to your needs, whilst increasing contrast, reducing glare and increasing the ...

Find out more about the Baader Hyperion Finetuning-Ring 14mm

The Baader Hyperion 14mm Finetuning-Ring will allow you to easily change the focal length of your Hyperion eyepiece. The finetuning-ring has an outside diameter of 2” and is equipped with a male M48 thread on one end and a female M48 thread on the other. The ring simply attaches to the ring between the front negative element and the main body of the Hyperion eyepiece (not included) and this ...

Find out more about the Sky-Watcher 2 Inch 90 Degree Star Diagonal

A 2 inch 90 degree Star Diagonal which will accept 2 inch eyepieces directly. Comes complete with a 1.25 inch adaptor for 1.25 inch eyepieces.

Find out more about the Baader OIII Filter

The 1.25" Baader OIII Filter is specially designed for the observing the night sky and offers high contrast views of gas and planetary nebulae that are emitting light from narrow OIII wavelengths. For many objects, the Baader O-III reveals a level of intricate detail that rivals the best deep sky photographs, the Baader O-III perfectly isolates the two doubly ionized oxygen lines (496 and 501nm), ...

Find out more about the Baader Single Polarising Filter

Astronomical polarising filters such as this are predominantly useful in lunar observation. Lunar images can appear overly luminous, with details lost in the glare. A polarising filter will cut down the glare and sharpen contrast, allowing you to pick out more details on the lunar surface.

Find out more about the Optical Vision Field Flattener

The Sky-Watcher Field Flattener is a superb quality, non-focal reducing field flattener optimised for DSLR imaging on refractor telescopes with focal ratios of between f/5.5 to f6.0. Will also provide much improved results on refractors with focal lengths narrowly outside this optimised f/range. Integral T-Ring adaptor thread. High quality CNC machined body with gloss black anodised finish.

Find out more about the Baader T-2 Extension Tube 7.5mm

This Baader T-2 Extension tube enables you to extend the spacing between T-2 components (T threaded adapters and T-rings) by 7.5mm, in order to precisely suit your optical requirements. It features an internal T-2 thread on one side and a T-2 thread on the other.

Find out more about the Sky-Watcher Twist Lock Adapter 2inch to 1.25inch

This metal Sky-Watcher Twist Lock Adaptor is an innovative 2"-1.25" low-profile helical self-centring eyepiece adaptor designed to securely grip your 1.25" accessories with its polypropylene compression ring, centring them in your 2" focuser. Furthermore, unscrewing the knurled locking ring exposes a male T-thread on the lower black barrel, which functions as a 2" to T-thread adaptor by itself.

Find out more about the Sky-Watcher Cheshire Collimating Eyepiece

Cheshire Collimating Eyepiece.Designed to assist with the accurate collimation of a Newtonian reflector telescope.

Find out more about the Baader AstroSolar Spotter Filter 80mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass - this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Baader AstroSolar Spotter Filter 50mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Sky-Watcher 90 degree Erecting Prism

90 degree Erecting Prism designed to fit 1.25”/31.7mm focusers and eyepieces.Designed to give a more comfortable viewing position, and to correct upside down images.

Find out more about the Optical Vision 2 Inch Variable Polarising Filter

The Skywatcher 2 Inch Variable Polarising Filter is a high quality anodised aluminium, optical glass variable polarising filter designed to reduce the amount of light entering your eyepiece. You can progressively dim the view when observing a bright object, such as the Moon or certain planets, to a level according to your needs, whilst increasing contrast, reducing glare and increasing the amount ...

Find out more about the Sky-Watcher f/4 Aplanatic Super Coma Corrector

Optimised for Sky-Watcher superfast f/4 Quattro imaging Newtonians, delivering stunning wide-field views with pinpoint stars to the edge of the flat field, leaving the magnification unaltered.

Find out more about the Baader Fringe Killer Filter

Baader's Fringe Killer filter minimises the blue fringing sometimes present in images, as well as any red fringing of 656nm or more. Light transmission remains good, so the image should still be bright and clear.

Find out more about the Sky-Watcher M48 Field Flattener for Esprit 150

Sky-Watcher M48 field flattener designed to optically match Esprit-150ED Triplet Refractor Telescope.Threaded especially for the Esprit-150ED with a M48 camera thread, with 2 multi-coated lenses housed in an aluminium body.

Find out more about the Optical Vision Laser Collimator

This 1mW red laser collimating device boasts some of the best and most practical functions collimators can offer. A large display window allows the user to clearly see the face of the device. Whilst most other brand name collimators only have one setting, this has seven adjustable brightness levels. The 1.25" laser collimator comes complete with a removable 2" adaptor, for use in all sizes of ...

Find out more about the Sky-Watcher 45 degree Erecting Prism

Perfect for both astonomical and terrestrial observing, these fully-coated diagonals offer correctly oriented images with excellent sharpness and contrasts. Designed for 1.25 Inch/31.7mm focusers and eyepieces.

Find out more about the Baader AstroSolar Telescope Filter 200mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Baader AstroSolar Telescope Filter 240mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Sky-Watcher M48 Field Flattener for Esprit 100

Find out more about the Baader Semi APO Filter

This Baader semi-APO filter is for use with achromatic optics and is designed to cut down on the chromatic aberration and fringe aberration of achromat lenses; presenting a clearer, crisper image.

Find out more about the Baader UHC-S / L-Booster Filter

This Baader UHC-S / L-Booster Filter has been produced to aid in deep sky viewing. Extraneous light is reduced and contrast is upped; increasing the visibility of nebulae and stars.

Find out more about the Baader AstroSolar Telescope Filter 100mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Baader Astrosolar Spotter Filter 100mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Baader AstroSolar Spotter Filter 150mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Sky-Watcher 90 Degree Star Diagonal

A 90 degree Star Diagonal designed to fit 1.25”/31.7mm focusers and eyepieces, designed to give a more comfortable viewing position over extended periods.

Find out more about the Optical Vision Lunar/Planetary Filter Set

Enhance your viewing of the planets and the moon. Even a 3/4 moon can reflect enough light to strain the eyes, so the use of a moon filter helps to reduce the incoming light and will even improve the contrast. The coloured filters are matched to help improve the viewing of a number of the Planets, and even comets.

Find out more about the Baader AstroSolar Telescope Filter 160mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Baader AstroSolar Telescope Filter 280mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Sky-Watcher M48 Field Flattener for Esprit 80

Find out more about the Sky-Watcher 2 Inch Deluxe Di-Electric Coated 90 degree Diagonal

The mirrors inside these diagonals have undergone a special high-reflectivity multi-coating process, allowing them to reflect 99% of the precious gathered starlight, providing exceptional brightness and contrast (Standard diagonals typically reflect 90-95% of light).

Find out more about the Optical Vision 1.25 Inch UV/IR Cut-Off Filter

This UV/IR cut-off filter blocks UV and IR rays to maintain the colour temperature you want, eliminating false colour fringes around bright stars. Offers a 99.9% light transmission rate for bright and clear images. Suitable for visual observations and for CCD photography. Threaded to fit standard 1.25” eyepieces.

Find out more about the Sky-Watcher 1.25 Inch Deluxe Di-Electric Coated 90 degree Diagonal

The mirrors inside these diagonals have undergone a special high-reflectivity multi-coating process, allowing them to reflect 99% of the precious gathered starlight, providing exceptional brightness and contrast (Standard diagonals typically reflect 90-95% of light).

Find out more about the Optical Vision 1.25 Inch Ultra High Contrast (UHC) Filter

The Sky-Watcher 1.25 Inch Ultra High Contrast (UHC) Filter is the best all-around dark-sky nebula filter. This filter permits superb views of objects like the Orion, Lagoon, Swan and other extended nebulae. It performs well in smaller aperture instruments owing to its greater light transmission than the O-III, yet still suppresses light pollution well. Supplied with storage case.

Find out more about the Optical Vision 2 Inch Ultra High Contrast (UHC) Filter

The Sky-Watcher 2 Inch Ultra High Contrast (UHC) Filter is the best all-around dark-sky nebula filter. This filter permits superb views of objects like the Orion, Lagoon, Swan and other extended nebulae. It performs well in smaller aperture instruments owing to its greater light transmission than the O-III, yet still suppresses light pollution well. Supplied with storage case.

Find out more about the Baader Astrosolar Telescope Filter 140mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Baader AstroSolar Telescope Filter 180mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Baader AstroSolar Spotter Filter 115mm

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film. Many ready-made filters stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely destroys the image quality, rendering the film useless for high magnification work. AstroSolar film must be mounted entirely un-stressed in ...

Find out more about the Sky-Watcher 0.85x Focal Reducer/Corrector for Evostar-120ED DS-PRO

Designed for serious Astro-Imagers and optimised for the Evostar-120ED PRO, the Sky-Watcher 0.85x Focal Reducer/Corrector effectively reduces the telescope's focal length by a factor of 0.85x and provides much improved field-edge correction. Use in conjunction with Sky-watcher's M48 Canon or Nikon T-ring adaptors (product codes 20237 & 20238).