Filtro per telescopio SV220 da 7 nm Filtro nebuloso da 1,25 pollici per astrofotografia

Dual-Band 7nm Nebula Filter for Astrophotography SVBONY

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

Features

• 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 unwanted disturbances such as skyglow.