Περιγραφή
- SVBNOY H-Alpha 5nm 2″ Filter blocks the transmission of contrast-killing light pollution wavelengths; improve contrast and detail;
- This H-Alpha filter also blocks infrared wavelengths from 700nm to 1000nm so you don’t need a separate IR-Cut filter
- Allowing 5nm bandwidth of light centered on a wavelength of 656.3nm to pass through; 90% transmission;
- Astrophotography under a light-polluted night sky can be difficult; the solution is an H-alpha filter; the H-alpha cut-off filter works to filter out a large part of this light pollution;
- 2 inch mounted; the filter can thread directly into the 2 inch barrel of your telescope eyepiece.
Note: This OIII filter is NOT for use on the Sun, and also unsuitable for telescopes with a focal ratio below f/4
