Filter Oiii 5 Nm Diameter. 50mm Not Mounted. This Filter Has The Same High Quality Of The Filter H-Alfa, With A Transmission Peak At Around 90% And A Value Fhwm Of 5Nm. The Spectral Shapes Are Designed To Minimize Loss Of Optical Transmission With Short Focal Ratio.
Astrodon Tru-Balance LRGB Gen II E Series 1.25" / 31.8 mm mounted filter set. The E Series is the best choice for your Sony-based or Kodak KAF (full-frame technology) based CCD camera. We suggest the E Series also to CMOS camera owners, chromatic response will be perfect.