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Visual Filters

15 Items
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OVL Light Pollution Filters
OVL Light Pollution Filters
From  £22.00

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. 

OVL O-III Narrowband Filters
OVL O-III Narrowband Filters
From  £45.00

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

OVL UHC (Ultra High Contrast) Filters
OVL UHC (Ultra High Contrast) Filters
From  £45.00

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

OVL Variable Polarising Filters
OVL Variable Polarising Filters
From  £26.00

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

Orion USA 1.25'' Variable Polarizing Filter
Orion USA 1.25" Variable Polarizing Filter
£39.99

The Orion Variable Polarizing eyepiece filter acts like a dimmer switch for your telescope, to tone down brightness and accentuate contrast of bright celestial objects.

Celestron 1.25'' Moon Filter
Celestron 1.25" Moon Filter
£15.00

Reduce glare and increase contrast of the Moon

OVL Clear Sky Filter (1.25'')
OVL Clear Sky Filter (1.25")
£44.00
£45.99

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

Orion UltraBLock NarrowBand SCT Filter
Orion UltraBLock NarrowBand SCT Filter
£99.99

Blocks all forms of light pollution while passing critical hydrogen-beta and ionized oxygen wavelengths of light.

Orion USA SkyGlow Broadband Eyepiece SCT Filter
Orion USA SkyGlow Broadband Eyepiece SCT Filter
£99.00
£129.00

SkyGlow improves the views of nebulas, galaxies and star clusters, especially when viewing in areas with light pollution from streetlights and sources

OVL H-Beta Filters
OVL H-Beta Filters
From  £19.99

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.

Celestron Planetary Filter Set - 1.25''
Celestron Planetary Filter Set - 1.25"
£34.99
£39.99

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

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

Comprises 4 x high quality glass colour filters.  

Celestron 1.25" Moon Filter Set
£36.00
£44.99
Celestron Variable Polarizing Filter
Celestron Variable Polarizing Filter
£29.99
£34.99
Neutral Density Moon Filter 13% 1.25''
Neutral Density Moon Filter 13% 1.25"
£16.00
£16.99
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