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  • Astronomik filtro UHC 31,8mm Astronomik filtro UHC 31,8mm

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Astronomik OIII 6nm CCD 31,8mm filter

Product code: AS8H00N6

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Quick Overview

The Astronomik OIII 6nm CCD 31,8mm filter is suitable for imaging of OIII nebulas from observation sites with light pollution and from dark sites as well. The contrast between an object glowing at 501nm and the background is increased enormous!


The 31,8mm model threads directly to 31,8mm nose that has m28 thread.

Availability: In stock

€199.00
22% tax incl
if you pay by bank transfer €193.03

Details

Due to the combination of the narrow bandwidth of 12nm and the high transmission of typically 96% the filter gives you an contrast boost, as all unwanted light from other wavelengths than 501nm is blocked form UV up to the IR. This results in an very dark background compared with any filters with a higher bandwidth. The FWHM of 6nm is optimized with CCD or CMOS cameras with a low dark current. The 6nm filter is the best choice if you are observing from a heavily light polluted site or if you are imaging faint objects in starcrowded regions of the milkyway.

 

Main use

The filter blocks all unwanted light from artifical light-pollution, natural airglow and moonlight. Especially light from High- and Low-Pressure Sodium and mercury lights and all lines of natural airglow are 100% blocked. The filter increases the contrast between the sky-background and objects.


 

Suitability

Guaranteed Transmission of more than 90% at the OIII Line (501 nm)
Typical Transmission of 96% at the OIII Line (501 nm)
Full-Width-Half Maximum (FWHM): 6nm
perfect blocking of unwanted light from UV up to the IR
parfokal with all Astronomik filters
MFR Coating technique: Usable with all optics up to f/4
Thickness of 1mm
Not sensitive to moisture, scratch resistant, not aging
opticaly polished substrate, striae-free and free of residual stresses
High quality storage box

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