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Chroma H-alpha (5 nm) Filter, 1.25" mounted

Name: Chroma H-alpha (5 nm) Filter, 1.25" mounted
Brand: Chroma
SKU: CT27002125M
Price: 514 EUR

Chroma 5 nm H-alpha narrowband filter for astrophotography - images with very high contrast even with strong light pollution

1.25" mounted, intended for cameras with smaller sensors up to 4/3"

Suitable for telescopes and lenses with a focal ratio of f/4 and slower

Very narrow bandwidth of only 5 nm for very high contrast

Central wavelength 656.3 nm

Filter thickness 3.0 mm

Blackened edge to avoid internal reflections

Manufacturer: Chroma

Product number: CT27002125M

EUR 514,00

incl. 19 % VAT (DE)

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excl. 6.95 € shipping costs (DE)

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Chroma H-alpha (5 nm) Filter, 1.25" mounted

Chroma 5 nm H-alpha narrowband filter for astrophotography - images with very high contrast even with strong light pollution

1.25" mounted, intended for cameras with smaller sensors up to 4/3"

Suitable for telescopes and lenses with a focal ratio of f/4 and slower

Very narrow bandwidth of only 5 nm for very high contrast

Central wavelength 656.3 nm

Filter thickness 3.0 mm

Blackened edge to avoid internal reflections

Details..
Technical data..
In the box..

Chroma Narrowband Filters with 5 nm Bandwidth

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

H-alpha filters can only be used photographically, but objects emit about three times as much at this wavelength as they do at H-beta.

The quality features of these narrowband filters at a glance:

High light transmission and very 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

FWHM:	5 nm
CWL:	656.3 nm
Peak transmission:	approx. 99 %
Type of coating:	Sputtered
Surface accuracy:	Lambda/4 or better
Filter thickness:	3.0 mm
Cell:	Metal cell with 1.25" filter thread