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Astronomik CLS CCD Filter 31mm Round Mounted
Model: ak_cls-ccd_2Part Number: 10208200
The CLS-CCD Filter enhances the contrast between astronomical objects and the background. Due to the wider transmission curve compared to UHC filters, a greater amount of light will pass the filter. Stars will be less dimmed. This filter has been optimised to block as much spurious light as possible and simultaneously provide the best performance for 'useful' light. A good filter for DSLR-, CCD- and film b/w-photography as well as observation of deep-sky-objects with telescopes or photo lenses of all aperture f/3 and above.
The filter blocks completely emission lines of artificial light sources like streetlights (e.g. sodium- and mercury-vapor) as well as the airglow. All 'important' emission lines as well as the spectral range of the night-adapted eye are passed.
The supplementary IR-blocking layer allows the use for DSLR- and Webcams without an integrated IR-block filter.
The major emission lines of artificial light pollution:| Hg 435,8nm | Hg 546,1nm | Hg 577,0nm | Hg 578,1nm || Na 589,0nm | Na 589,6nm | Na 615,4nm | Na 616,1nm |The major emission lines of nebulas:H-β 486,1nm | OIII 495,9nm | OIII 500,7nm | H-α 656,3nm
This is a superb filter for my new modified 850D DSLR . It is very suitable for astrophotography , and gives very good star colours on images . Emission nebulae are shown really well with this filter , and it gives very good contrast on all Deep Sky objects . It is very easy to install and remove from the camera . I highly recommend it
Was out late Sunday night testing this filter in Bortle 6 skies here in Uppsala, Sweden.It does a very nice job 👌 Will be my luminance filter of choice moving forward
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