Optolong Filters OIII 3nm 2" (73722)

The OIII Filter: This narrowband OIII 3nm filter is specifically crafted for observing nebulae. It allows a 3nm bandwidth of light centered on a wavelength of 500nm, corresponding to OIII emission lines, while effectively blocking out all other light.

Specifications:

Capacity: Single

Connection (to eyepiece): 2"

Frame: 2"

Passband (nm): 500

Half-value width (nm): 3

General Type: Filters

Type of Build: Line filter

Area of Application:

Useful for photographs: Yes

Anti-light pollution: Yes

Planetary nebulae: Yes

Supernova remains: Yes

Visually useful: Yes

Hydrogen nebulae: -

Nebulae & galaxies: No