Optolong Night Sky H-Alpha Filter For Telescope Or Camera Lens

Optolong Night Sky H-Alpha Filter

THIS CAN BE USE AS COST EFFECTIVE H-ALPHA FILTER WHICH BLOCK 650NM AND BELOW SPECTRUM. IT IS NOT AS NARROWBAND BUT FOR FOCUS ON HA IMAGING ABOVE 650NM IS EFFECTIVE AS THERE IS ONLY HA AND SII (RED) ABOVE 650NM

IDEAL FOR IR PLANETARY IMAGING AND CONTRAST BOOSTER FOR NEBULOSITY

Night Sky H-Alpha filter (IR Pass 650nm) with 50% transition from blocking to passing at about 640nm and 95% or above transmission at wavelengths longer than 650nm can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths