CH4 8nm 1.25″ Filter E-series

Player One E-series is an upgrade series of S-series, using high quality optical glass substrate and multi-layer composite coating technology, producting with higher standard than S-series, optimized for CMOS/CCD camera, can provide very professional effect in astrophotography. 1.25″ CH4 8nm filter Specifications: 1.25 inch, thread M28.5*0.6 Frame thickness: body 5mm thread 2.5mm, a total of 7.5mm Filter glass thickness: 1.85mm Bandwidth: 8nm CWL (center wavelength):889nm PV: 1/4 lambda Transmittance: ≈90% Blocking depth: OD4