Optolong L-eXtreme Dual 7nm Ha/OIII Narrowband Filter - 2" Diagonals QuikFinder attaches without drilling and

QuikFinder attaches without drilling and is easily removed from its baseplate for storage

25" Binoviewers package out there

and it has a 45 mm wide Vixen type dovetail plate for mounting

) : 2" & 1

66” is designed to make it a perfect must-have tool for an astronomer’s night out

Optolong L-eXtreme Dual 7nm Ha/OIII Narrowband Filter - 2" Diagonals QuikFinder attaches without drilling andThe L eXtreme filter from Optolong is 7nm dual band in that passes Ha and OIII emission lines. The advantage of the L eXtreme filter over the L eNhance, which is a tri band filter, is that there are no transmission between the H beta and OIII lines, as there is no nebula emission lines there. In this case, it isn't letting light pollution come through so that maximizes a nebula's signal and makes the sky background darker while imaging. The L eXtreme