OPTOLONG L-eXtreme FILTER Size:2" SWMAK150-OTA

SWMAK150-OTA

15 7mm M48 extension + 7mm M48 extension + M48 spacer 1mm PL3304807 + PL3304807 + PL3304801 15

the flattener has a M69 female thread

Optical design RiFast

GM 3000 HPS mount includes:

OPTOLONG L-eXtreme FILTER Size:2" SWMAK150-OTAThe Optolong L eXtreme filter is a light pollution dual band filter designed to drastically reduce the effect of light pollution. Its two passing bands isolate the nebulae emissions in H Alpha (red) and OIII (green blue). The advantage of the L eXtreme filter is that there is no transmission between the H Alpha and OIII lines as there are no nebula emission lines there. It blocks the light pollution, maximises nebulae signal and makes the sky