Filters

Very good condition, glass is clean. Fits 1.25" eyepieces. Comes with original case.

Very good condition, glass is clean. Fits 1.25" eyepieces. Comes with original case.

Second Hand No.21 1.25" Filter. The filter is in good condition with a few minor signs of wear. Filter display case included.

Please note this is a second hand item. Great condition and comes in original box. 

The #56 Green Filter is excellent for the observation of Martian polar ice caps and for the dust storms on the planet's surface

This Celestron green filter is used but in very good condition. The glass is clean and it is supplied with original case. Fits 1.25" eyepieces.

Baader 1.25" Neutral Density Filter with optical density ND 0.9 - Transmission 12.5% - Reduction factor 8.
For perfect energy management during Lunar and Solar observation. Suitable for solar observing only as an additional filter!

Enhances contrast during planetary observation.
Also extremely Useful for solar work in conjunction with Baader Herschel Wedge Prism (#2956500V or #2956500P)

Please note this is a second hand item. The film has been replaced by us in the show room and works great. Great for solar work with your spotting scope. 

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

A fantastic mixed kit including 2 filters, 2 eyepieces, 2 barlow lenses and a 45 degree diagonal all matched together in a soft shell case.

We have a BC&F Astro Engineering Min-VB Anti Fringe Filter in 1.25" format. A nice subtle anti fringe filter ideally used in refractors.

Glass 2+: High quality hand selected glass with metallic coating on inside surface facing optics. All filters block 99.999% of the energy from entering the instrument.

Please note this item is second hand so it has the usual signs of wear but it is in excellent condition otherwise. The filter is unmarked and the cell is in excellent condition.

A Baader Planetarium exclusive. Filters incorporating Baader Planetarium’s Life-Coat™ technology are so durable that Baader Planetarium warrants the coatings for the life of the filter.