OPTOLONG 1.25" UV/IR Cut Filter for CCD Astrophotography
UV/IR cut filter for CCD astrophotography with high transmission at key wavelengths. Maintains telescope performance with durable, scratch-resistant material. Customer insight mentions no explicit feedback
Highlights
- high wavelength transmission
- durable filter material
- all-round deep sky utility
Pros
- high transmission at multiple wavelengths
- scratch-resistant
- not sensitive to humidity or aging
- ideal all-round deep sky filter
- excellent carrier material
Cons
- customer insight: text: None
Best For
Features
- High transmission at key lines: 96% at 486nm (H-beta) and 95% at 496nm (OIII)
- Wide passbands include 450–520nm and 620nm regions
- Excellent mechanical and optical durability: scratch-resistant and humidity-resistant materials
- Parfocal with other Optolong filters; glass thickness 1.85mm ensures optical compatibility
- Diffraction-limited performance with stable transmission and minimal impact on telescope optics
