OPTOLONG 1.25" UV/IR Cut Filter for CCD Digital Astrophotography($44.00Value)

Description

1. 96% transmission at 486nm (H-beta) 2.95% transmission at 496nm (OIII) 3.92.5% transmission at 501nm (OIII) 4.98% transmission at 656nm (H-alpha) 5. pass from 450 to 520nm and from 620nm 6.Entire Blocking of annoying wavelengths 7.Ideal All-round Deep Sky filter even for small telescopes 8.Not sensitive to humidity or aging 9.Scratch-resistant 10. Excellent carrier material. The optical Leitungs of your telescope is not reduced by the filter in any way 11. Parfocal with other Optolong filters 12.Glass thickness: 1.85mm 13.Completely resistant against high humidity, scratches and aging effects 14.Diffraction limited, the filter will not reduce the optical performance of your telescope 15.Optolong filters are delivered in a high-quality, long lasting, filter box OPTOLONG Astronomical filters are used worldwide by professionals and advanced amateurs because of their superior quality and our guarantee. Our filters are correctly optimized for naked eye visual observation, each object will be viewed with maximum contrast through your eyepiece. The transmission curves of the filters are designed so that you gain maximum contrast and brightness while retaining the subtlest gradations in each object. Unmatched optical quality and high efficiency hardened multi-coatings result in the sharpest and highest images possible.