CHROMA Filters OIII 8nm 1,25" - Telescopium Athens

Name: CHROMA Filters OIII 8nm 1,25"
SKU: CHR-ACC-0013
Availability: BackOrder

Product details

These nebula filters from Chroma offer high contrast. Thus, the astrophotographer achieves a good result even with stray light from cities. The high transmission is given up to a focal ratio of f/4.

The [O III] line of doubly ionized oxygen is emitted only where the radiation of the star that makes the nebula glow has high energy and oxygen is present. After H-alpha, it is the next most common emission when imaging nebulae and the most common one for visual observation.

The quality features of these narrowband filters at a glance:

High light transmission and narrow bandwidth to maximize contrast

Use in light-polluted areas and dark locations

Extends exposure time in moonlight conditions

These narrowband filters can be used up to f/4 systems with virtually no signal loss.

Blackened edges to prevent internal reflections of stray light

A consistent filter thickness of 3.0 mm ensures parfocality