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
CWL (center wavelength):889nm
PV: 1/4 lambda
Blocking depth: OD4