OIII 5nm 2" filter for CCD photography in astronomy - SVBONY

• Model: SV227
• Type: OIII Filter
• Size: 2 inches
• Wavelength range: 300-1000nm
• CWL: 500.7nm
• FWHM: 5nm
• Maximum transmittance: ≥90%
• Substrate thickness: 1.85mm
• Blocking: ≥OD5
• Clear opening: 44mm
• Surface quality: 60/40
• Surface parallelism: 1/4λ
• Parallelism: 30"
• Thread: M48x0.75
• Unique threading: Yes
• Net weight: 12.5g

• Designed for the observation of nebulae
• Reduces the transmission of artificial light wavelengths
• Ideal for CCD photography in astronomy
• Provides well-defined nebula structures

Compatible with telescopes having a focal ratio greater than F/5.

OIII 5nm 2" filter.