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2 to f/1:8 with about 90% of the maximum transmission at a f/2 as guaranteed performance data
Installation steps of the clip
6 filter threads
Compact anodised aluminium enclosure
The coating of the protective glass increases the transmittance of the infrared band
Astronomik UHC-E Clip-Filter Sony Alpha 7 – Enhance Deep-Sky Viewing Cafe Equipment 2 to f/1:8 with aboutAstronomik UHC E Clip Filter Sony alpha 7 The Astronomik UHC E filter is our budget filter for deep sky observation of emission nebulae and comets under light polluted skies. Its particularly suitable for small scopes. The UHC E Filter increases contrast of emission nebulae and comets and blocks the light of typical streetlights as well as airglow. It is best suited for telescopes up to 5" 125mm. Main use The Astronomik UHC E filter provides a FWHM of
