520-292-5010

Optolong H-Alpha 7nm Filter - 2" Mounted

Optolong H-Alpha 7nm Filter - 2" Mounted

OPT-HA-7nm-2
H-Alpha 7nm filter is the most popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Best choice of narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details.
$259.00
OR
Details
Reviews

Details

Sizes
  • 2" Mounted
Specifications
  • CWL(centre wavelength): 656.3nm
  • Fwhm: 7nm
  • Tpeak: <85%
  • Coating Wavelength: 300-1100nm
  • Optical Denisity: OD3
  • Surface Quality: 60/40
  • Transmitted Wavefront RMS: λ/4
  • Parallelism (arcsec): 30s

Reviews

Write Your Own Review

Only registered users can write reviews. Please, log in or register