alis80b Posted February 3, 2021 Share Posted February 3, 2021 Hi, Does anyone know what the ideal distance should be from the sensor of my full frame mirrorless camera (Canon Ra) to the 0.85x reducer I have attached to my Sky Watcher 80ED telescope? I mean, I'm pretty pleased that i've managed attach it all together but going forward thought I should check, in case I need to buy anything else before launching into trying to get some deep sky images 😫 I've currently got the camera attached with a R to EF/EFS mount adapter and an M43 T ring to the reducer. I've tried to measure it and I think it's around 60mm from sensor to lens. Thanks 😊 Link to comment Share on other sites More sharing options...
+Ibbo Posted February 3, 2021 Share Posted February 3, 2021 IIRC it should be 55mmto the sensor. alis80b 1 Link to comment Share on other sites More sharing options...
alis80b Posted February 4, 2021 Author Share Posted February 4, 2021 46 minutes ago, Ibbo said: IIRC it should be 55mmto the sensor. Thank you! I think it is probably near to that. My 60mm was a bit of a estimate as I didn't want to unscrew everything 😊 +Ibbo 1 Link to comment Share on other sites More sharing options...
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