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The l-extreme is seriously worth its weight in gold if you’re shooting in osc. I’m using the asi294mc with various sct in a variety of configurations from f1.9 to f10 and the results are fantastic. It really cuts through light pollution like it’s not there. I’m using 1.25” but I have to screw it into the nose otherwise it vignettes too much if in the filter drawer. In hindsight I wish I’d got the 2”.
A good UHC filter and a UV-IR filter is also very useful. But not as useful as some dark sky!!
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