Askar 5nm Color Magic SHO Narrowband 2" Filters Set

Askar 5nm S II filter

The Askar 5nm S II filter is suitable for imaging of S II emitting nebulae or some supernova remnants. The Askar S II filter has an extreme high transmission at a center wavelength of 672.5nm. The 5nm narrow bandwidth enables this astro-imaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar S II filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.

The Askar S II filter is designed for improving the contrast and details of some nebulae and supernova remnants. Though there is very little sulfur in nebulae, but the emission from the trace of S II in nebulae is rather strong. The deep-red light emitted from S II can bring out the quite delicate detail which is different from those regions that release H-alpha light. So it works well on those nebulae emitting S II. Featuring 5nm narrow bandwidth and a greatly high transmission at a center wavelength of 672.5nm, the Askar S II filter can bring out the most amount of details of the emission nebulae, planetary nebulae and supernova remnants.

Askar 5nm H-alpha filter

The Askar H-alpha (Ha) 5nm filter is a helpful tool for imaging of H-alpha emitting nebulae or some supernova remnants. The Askar H-alpha filter has an extreme high transmission at a center wavelength of 656.5nm. The 7nm narrow bandwidth enables this nebula-imaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar H-alpha filter is suitable for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places.

Askar 5nm O III filter

The Askar O III 5nm filter is suitable for imaging of O III emitting nebulae or some supernova remnants. The Askar O III filter has an extreme high transmission at a center wavelength of 500.5nm. The 5nm narrow bandwidth enables this astroimaging filter to block all the light pollution and other unwanted artificial lights or night glow. So the Askar O III filter is an ideal instrument for astro-imaging in heavily light-pollution hit locations and delivers enhanced contrast at darker places. Besides, the special design of Askar O III filter makes it enable to reduce the bloating problem, with which an astrophotographer is frequently confront when shooting with an ordinary O III filter.

Technical Specifications

Askar 5nm S II filter transmission