Baader Filters 2" neodymium Moon and Skyglow filter

Neodymium Moon and Sky-glow filter with built-in IR blocker and PG-coating

a selective contrast filter, particularly suitable for all reflecting telescopes blocks particular regions in the visible spectrum where street lamp lighting and sky-glow due to scattered light are particularly irritating selective blocking reduces glare, but without reducing the ability to see important colour and brightness differences light transmission in the selected spectral ranges is over 95 %

Fits in all standard filter threads; and can be combined, for example, with the plane-optical polished Baader IR cutting filter! So blur from unfocused infrared can be prevented - an absolute must for digital astrophotography

plane-optical polished; can be used without any loss of sharpness as a single filter in front of a bino-viewer or for afocal projection with digital cameras (far away from the focal point!) stars appear much sharper when it is used with a DSLR camera due to the blocked IR range of the spectrum no drop in sharpness with magnifications above 200X, in contrast to flame polished filter glasses substrate (glass melt): neodymium doped coloured glass coating: 7-ply multi-layer hard coating / 'bullet-proof' dielectric IR blocking coating Hardened on both sides (ion beam hardened), absolutely scratch-resistant, water-resistant coating - can be cleaned as often as required