Celestron and OVL Filters

OVL 1.25" Lunar/Planetary Filter Set£39.00   £35.00

Comprises 4 x high quality glass colour filters.  

Celestron Planetary Filter Set - 1.25"£49.99

Colored filters can be used to bring out details on a planet’s surface or its cloud structure.

Celestron LRGB IMAGING FILTERSET 1.25 INCH£249.00   £229.00

Take color images of the night sky with your Skyris monochrome CCD camera, a simple filter wheel, and this four-piece LRGB filter set!

OVL L-RGB CCD Filter Set (1.25”)£139.00   £129.00

Designed for CCD astrophotography, the set includes Luminance-IR, Red, Green, and Blue dichroic CCD filters. 

Celestron 1.25" Moon Filter£16.00   £15.00

Reduce glare and increase contrast of the Moon

Celestron 1.25″ Moon Filter Set£44.99   £42.00

Neutral Density Moon Filter 13% 1.25"£19.00

Celestron SKRYIS IR-BLOCK Filter£39.00   £36.00

Colour CCD cameras such as the Skyris colour planetary cameras are very sensitive across the visual spectrum, as well as in infrared.

OVL Variable Polarising Filters£26.00  -  £38.00

Progressively dims the view when observing the Moon or bright planets whilst increasing contrast, reducing glare and increasing the amount of detail to study. 

Celestron Variable Polarizing Filter£34.99

OVL Light Pollution Filters£22.00  -  £31.00

These contrast-enhancing filters are designed to block out the wavelengths of light emitted by mercury-vapour light and other common causes of light pollution. 

Light Pollution Imaging Filter, Rowe Ackermann Astrograph£347.00  -  £697.00

Get the most out of your Celestron Rowe-Ackermann Schmidt Astrograph, even under light-polluted skies, with this Light Pollution Imaging Filter, custom-designed for RASA by Celestron and Astrodon.

OVL O-III Narrowband Filters£47.00  -  £69.00

The O-III narrowband filter is specially designed for the observation of gas and  planetary nebulae.

OVL UHC (Ultra High Contrast) Filters£47.00  -  £69.00

The narrowband UHC filter isolates the two doubly ionized oxygen lines (496 and 501nm) and hydrogen-beta line (486nm).

OVL UV/IR CUTOFF FILTER (1.25")£43.99   £42.00

This UV/IR cut filter blocks UV and IR rays to maintain the colour temperature you want, eliminating false colour fringes around bright stars.

OVL Clear Sky Filter (1.25")£44.99

Blocks night glow and airglow, sodium and mercury emissions (but not UV or IV). 

OVL H-Beta Filters£29.99  -  £39.99

This high performance CCD filter transmits only the Hydogen Beta emission line, and therefore is useful for greatly increasing the contrast of objects that glow in the corresponding region of the spectrum, for example the Horsehead, Cocoon and California nebulae.

Sky-Watcher 5-Position Manual Filter Wheel£69.99   £65.00

This handy, time-saving device is a must-have for astronomers, for both visual and photographic use.