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Old 31-10-2018, 10:09 PM
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PRejto (Peter)
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Join Date: Jan 2011
Location: Rylstone, NSW, Australia
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Here is a link to a very interesting comparison test of many different brands including both Astronomiks:


https://www.flickr.com/photos/109613...h/28921555845/


I believe the Deep Sky filters were primarily designed to aid refractors that may be lacking in a bit in deep blue correction. You will notice that the cut off is considerably different between the two sets (380nm vs 410nm). I do find that FWHM is better in blue with these compared to the type 2c, however, the penalty is perhaps about 1/3rd longer integration.


Peter
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