VHT Filters The VHT filter is an excellent Nebula filter for smaller scopes (4-6 inches aperture) where light gathering and throughput are at a premium. It is also quite effective with larger scopes. The VHT filter offers a good compromise between an Ultra High Contrast type filter and a Broadband Light Pollution Reduction filter and has the quality of enhancing emission and reflective nebula with a minimum of background stars being dimmed. If you have ever viewed with nebula filters and felt “cheated” by the reduction of stars in the FOV then you will be pleasantly surprised by the VHT filter.
The VHT (Very High Throughput) filter is an excellent Nebula filter for smaller scopes (4-6 inches aperture) where light gathering and throughput are at a premium. It is also quite effective with larger scopes.
Note: Images on this site were acquired through NASA's Hubble Space Telescope WFPC using Omega Optical's filters and are used here courtesy of NASA's Jet Propulsion Laboratory.