SV220 Telescope Filter 7nm1.25 inches Nebula Filter forAstrophotography

Dual-Band 7nm Nebula Filter for Astrophotography SVBONY

This narrowband filter is specifically designed for astrophotography, allowing you to capture color images even in environments heavily polluted by light. It is particularly useful for photographing emission nebulae, planetary nebulae, and supernova remnants.

Characteristics

• Size: 1.25 inches (31.75 mm)
• Substrate thickness: 1.85 mm
• Clear aperture: 26 mm
• Wavelength range: 300-1100 nm
• FWHM (OIII and HA): 7 nm
• Blocking: >OD5
• Maximum transmission: 500.7 nm @ T>90%, 656.3 nm @ T>94%

This filter is designed to eliminate interference caused by artificial light from sodium or mercury lamps, as well as other undesirable disturbances like the halo of sky light.