Observing difficult, dim Deep Sky targets like Planetary Nebulae and certain supernovae remnants, such as the Veil Nebula in Cygnus from light poluted environments can be a very tricky business. This is where the Explore Scientific 1.25" O-III Nebula Filter shows its strengths.
This Baader Planetarium Solar Continuum Filter comes in a fully-threaded 1.25" & 2" round cell. Works in conjunction with a primary white light solar filter (or Herschel Wedge Prism) to show more granulation and sunspot detail!
Infrared-blocking filter for digital photography. The filter should be used as a standard at all imaging applications with sensors having a low sensitivity in the UV, e.g. Webcam, DSI and LPI from Meade or most video systems.
Standing for "City Light Suppression", the Explore Scientific 2" CLS Nebula Filter is not just for observing nebulous objects, as it lets a broader swathe of wavelengths through to the observer than either the OIII or UHC Explore Scientific filters do.
More versatile than the OIII filter, the Explore Scientific 2" UHC Nebula Filter will work on a broader range of nebulous objects, due to its dual peaks in transmissions on both broader OIII lines and Hydrogen wavelengths
The Explore Scientific H-beta filter uses a characteristic property of the so called emission nebulae. Those objects glow in special colors, the so called emission lines. Those emission lines are linked to chemical elements - in this case hydrogen.