Used Astronomik UHC Filter - 1.25" Round Mounted

This is an Astronomik UHC filter in good condition.  The optical surfaces are generally, clean, but they do have dust on both sides that we have not been able to clean.  See the photos. We have taken this issue condition into consideration in the pricing - HALF OFF.  

This includes its original jewel case but no box.  

Astronomik UHC Filter - 1.25" Round Mounted

• This Astronomik UHC Filter, a great visual filter designed for broadband deep sky observing, is mounted in a 1.25" machined cell

• Made to the highest technical standards to supply the high optical performance you want and need for observing deep sky objects

• With a high transmission of nearly 100% of H-Beta and OIII lines, you will see lots of extra detail in gas and planetary nebulae

• All Astronomik filters feature multi-layer coatings to protect them from blemishes caused by scratching, aging, and humidity

• vMade in Germany, a country known for producing optics of supreme quality!

More About the Astronomik 1.25" Round Mounted UHC Filter

This Astronomik UHC Filter is made for visual deep sky observation. It allows almost 100% of radiation from both OIII and H-beta lines to pass through. Additionally, a second bandpass for the H-alpha line makes sure that this radiation also reaches the eye. Meanwhile, scattered light from other wavelength ranges is filtered out. Due to the strong reduction of the sky background, gas and planetary nebulae are visible with an unexpected abundance of detail. The Astronomik UHC Filter provides enough light to successfully observe deep sky objects with smaller telescopes because of its high transmission.

Optimized for use with telescopes that have focal ratios of f/4 to f/15. Unlike other filters on the market, loss of transmission and color displacement only occurs with this filter when extremely fast focal ratios of f/3 or less are involved. The UHC filters work with 2" aperture instruments and above but work particularly well with 5" apertures and larger. Compared to UHC filters sold by other manufacturers, the Astronomik UHC filter shows you more stars along with more nebula detail, and because of the high quality of the glass, you will be able to see stars as small pinpoints.

The coatings are completely sealed and immune to moisture. They do not change with time, keeping their transmission characteristics indefinitely. Astronomik UHC filter coatings are so tough that it is impossible to scratch them by mistake. To get even the finest of scratches, you would have to rub them with sandpaper! Astronomik filters include a high quality, long-lasting, plastic storage case.

All  Astronomik Filters are perfect for modern cameras, including both CMOS and CCD based cameras, allowing you to capture the very best images possible with your instruments. Sharpness, contrast and the absence of any reflections is guaranteed.

Each and every Astronomik filter has to pass a complex quality control process before being suitable for delivery to our customers. Each and every emission line filter is measured with a high-end Perkin-Elmer spectral-photometer to make sure that every single filter is up to the specifications published on our website.