IDAS Light Pollution Suppression Filters - V4 Nebular Filter. LPS-V4 filter for Canon APS-C frame camera [HU-LPS-V4-EOS-CLEARANCE]

Astro Hutech: The IDAS LPS-V4 filter is designed to provide maximum contrast between key astronomical emission lines and a light polluted sky. These filters incorporate IDAS MBT, UFP, and IGAD technologies to insure undegraded and extremely durable optical performance.

Features include:
Near IR is blocked completely, eliminating the need for an additional filter to block IR.
Narrower H-alpha bandpass.  In combination with a Kenko R1 filter, this can be used as a 19nm bandpass H-alpha filter.
Retains the excellent color balance of the LPS-V3 filter when one-shot color cameras are used.
Easy creation of H-alpha enhanced color images
LPS-V4 filters are available as camera-body-mounted filters (LPS-V4-37) for Canon digital cameras or as screw-in filters for telescopes or telephoto lenses in the following sizes:
28.6 mm
48 mm
52 mm