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The advanced multi-coatings on our ALP-T ultra dual band filter effectively isolate the red Ha and the blue-green OIII lines light from emission nebulae
5mm earphone Jack for the V115 shortwave radio
Large screen LCD display
allowing basic afocal or eyepiece-projection astrophotography
Non-glued substrate Surface Quality S/D (scratch/dig)= 60/40 (Refer to MIL-O-13830) Transmitted Wave front Lambda/4 or better Parallelism less than 30 arcsec
Astronomik UHC 31mm Filter – Enhance Deep-Sky Viewing with High Contrast usb astronomy camera The advanced multi-coatings on ourAstronomik UHC 31mm The Astronomik UHC is THE filter for visual observing. You will enjoy using your Astronomik UHC filter because you will see more stars and more details in deep sky objects compared to using filters from all other manufacturers. The Astronomik UHC (Ultra High Contrast) filter allows the transmission of nearly 100% of the radiation from both O III and the H beta lines. Though the second window for the H alpha line is not intended for
