paul Posted June 2, 2022 Share Posted June 2, 2022 (edited) I was testing out my Samyang 135mm mount last night. After messing around with it and Ekos I managed to bag 56 mins of Ha and 30 mins or Oiii. The results are surprisingly good for first light, the F2 lens grabs a lot of light. Even so, Oiii is lacking signal and the sky wasn't really dark enough for it so contrast is off. There is a lot of tilt visible in the top right quadrant that makes stars not round. Given its an F2 mount I think the tilt is very small and not something I can easily fix with the ZWO -EOS adapter. To address that I'm ordering the Astro Essentials Samyang Lens to M48 Adapter from FLO which I will use with the Altair variable spacer to get the critical backfocus right. I've also ordered a longer dovetail to support the camera without relying on the lens-mount to do it all. Edited June 2, 2022 by paul 9 Quote Link to comment Share on other sites More sharing options...
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