Visual Filters

Baader SEMI APO Filter£59.00  -  £85.00

Baader's newest addition for Achromat owners

Baader SOLAR CONTINUUM Filter£59.00  -  £99.00

Baader Planetarium Solar Continuum Filter

OVL Hydrogen-Alpha CCD Filter (1.25")£49.99

This long-pass filter limits transmission of light with wavelengths longer than 650nm. 

Baader CONTRAST BOOSTER Filter£49.00

A unique filter for many different astronomical tasks. Incomparable in accracy to combinations of generic colour filters made of raw polished glass – where surface inaccuracy adds up in the optical wave front to an unbearable degree!

Baader FRINGE KILLER Filter£49.00  -  £75.00

The BAADER Fringe-Killer Filter minimizes unwanted blue fringing, comparable to a Minus-Violet-Filter, while retaining a very pleasing colour balance. 

Baader NEODYMIUM & IR CUT (Moon & Skyglow) Filter 31.7mm£49.00  -  £85.00

Drastically improves contrast for all reflector telescopes, without loss of brightness!

Celestron Planetary Filter Set - 1.25"£50.00   £47.00

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

OVL O-III Narrowband Filters£42.99  -  £69.99

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

OVL UHC (Ultra High Contrast) Filters£42.99  -  £69.99

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

OVL Clear Sky Filter (1.25")£39.99

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

OVL Deep Sky Filter (1.25")£39.99

This filter blocks low and high pressure mercury and sodium vapour lamplight and neon light whilst letting the rest of the visible spectrum through.

OVL UV/IR CUTOFF FILTER (1.25")£39.99

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