Marmot Posted June 12, 2021 Share Posted June 12, 2021 (edited) Hi The title explains my question, but I will give a little more detail so that people understand why I ask. I recently purchased (used) a Revelation Astro 2x 2inch Barlow. I have one 2 inch eyepiece, a Skywatcher Aero ED. I purchased the Barlow as it has an element that unscrews allowing it to be screwed into the eyepiece filter thread giving a lower magnification (approx 1.5). This appealed to me as although I didn’t feel the need to double the mag of my Aero ED, I did feel that the slight increase in mag using the screw in element would be useful and would be more cost effective than purchasing another eyepiece. Unfortunately the element does not screw on, but sticks after about a turn. Both threads appear clean and not blocked by any debris so I can only assume the threads are different. So I ask the question to see if this is a known issue or if I am unlucky and have a defective thread? Unfortunately, as my initial plan seems like it won’t work I may have to sell on the Barlow☹️ Edited June 12, 2021 by Marmot Add picture. Quote Link to comment Share on other sites More sharing options...
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