Baader Filters OIII CMOS Narrowband 1.25" (70858)

The narrowband O-III 3nm filter is optimized for observing nebulae, allowing light with a 3nm bandwidth centered on a wavelength of 500nm to pass through. This corresponds to the OIII emission lines, while all other light is effectively blocked. Ideal for astrophotography, this filter enhances contrast and detail in nebulae by isolating specific wavelengths and reducing light pollution.

Specifications

• Central Wavelength (nm): 500.7

• Half-Value Width (nm): 6.5

• Frame: 1.25"

• Mount Material: Aluminium

• Coating of Optical System: Reflex-Blocker™

• Connection (to the Telescope): 1.25"

• Appropriate for: f/10 - f/3.5

• Filter Thickness (mm): 2

General Information

• Type: Filters

• Type of Build: Line Filter

• Series: Narrowband

Area of Application

• Useful for Photographs: Yes

• Visually Useful: No

• Twin Stars: No

• Moon & Planets: No

• Nebulae & Galaxies: Yes