2" L-eNhance Deep-Sky Light Pollution Filter Focal Ratio_4. f/10 - f/15 but not at or near

but not at or near the center (unless you are very lucky

Now if we have a changing magnetic field in the metal

and enables easy adjustment and tracking even when the payload is fully utilized

this focal extender adds some real versatility to your telescope accessory line-up

Featuring 10x magnification and 42mm roof-style BaK-4 lenses

2" L-eNhance Deep-Sky Light Pollution Filter Focal Ratio_4. f/10 - f/15 but not at or nearThe L eNhance is a three band filter and ideal for strong suppression of light pollution. It enables astrophotos of objects with narrow band emissions in the O III, H Beta and H Alpha lines out of the city. Professional photographic filter for astronomy Enhances the photography of emission nebulae in the city Ideal for strong suppression of light pollution Allows astrophotography even from bright cities High transmission for O III, H Beta and H Alpha