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I use the 2" Astro-Physics advanced barlow which splits apart and allows the lens to be screwed into female 48mm and T-threads (42mm) .
You can adjust the spacing to go from 1.8x to 2.5x but I have found that can easily be extended from 1.5x to 3x with with no edge distortion on smaller sensors by simply removing or adding spacers into the image train.
Last edited by Peter Ward; 11-12-2022 at 09:42 PM.
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