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Model: ak_cls_125Part Number: 8H0053
The Astronomik CLS blocks the light of the spectral lines of mercury and sodium-vapour lamps and lets the largest part of the visible light and H-alpha emissions pass. All the important emission lines, as well as the spectral region that the very well dark adapted eye can see, can pass through the filter.
The filters are optimised for use with aperture ratios from 1:3 to 1:15. Transmission losses and chromatic distortions, which are problems with other filters, only appear with Astronomik filters when extremely bright aperture ratios of 1:2 and more are used.
The CLS filter is suitable for use with telescopes of all aperture sizes.
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
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First Light Optics LtdUnit 7 Budlake UnitsBudlake RoadMarsh Barton Trading EstateExeter, DevonEX2 8PY
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