Baader 2'' ClickLock Diagonal Mirror 300PX whilst trying to judge the

whilst trying to judge the size of a tiny point source of light

as standard

particularly for Jupiter and Mars

Its narrow 7nm FWHM bandwidth has a transmission at H-Alpha of over 90%

if you want colour results

Baader 2'' ClickLock Diagonal Mirror 300PX whilst trying to judge theClickLock Mirror Diagonal (2inch) 2" ClickLock Diagonal Mirror Oversized 2 "dielectric lamda 10 levels with 112mm optical length Mirror repels UV and IR radiation, provides high security at the solar observation in white light and with Ha sun filters Scratch resistant, hard coated mirror surface for safe cleaning, scratch resistant even in extreme conditions Baader 2" ClickLock clamp for ultrafast clamping action Removable 2" Safety Kerf nosepiece