+Stu Posted February 25, 2023 Share Posted February 25, 2023 I'm looking at a hig mag EP for my 80x560 refractor and I'm tied between a 3.5mm which will give me 160x (maximum for the scope) and 4mm at 140x. Am I best off not pushing it to the limit and going with the 4mm? Link to comment Share on other sites More sharing options...
+Bino-viewer Posted February 25, 2023 Share Posted February 25, 2023 Quite possibly yes. You'll find high power viewing is very much seeing dependant here in the UK. I quite often am limited to 120-150x if the seeing is poor, which is usually the case. My 15mm eyepiece pair gives me 170x and i'm more often than not pushing it a bit at that, so only use them if conditions allow. +Stu 1 Link to comment Share on other sites More sharing options...
+Stu Posted February 25, 2023 Author Share Posted February 25, 2023 Cool, I'll go with 4mm I think. My 5mm in the 150-PDS at 150x is usually ok on a clear night. Link to comment Share on other sites More sharing options...
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