Hi Marc
I have found that moving the camera back will indeed allow focus but the cost is clipping the image (I use QHY8 and D400). The larger lumicon's etc would probably alleviate this but when polar alligned on a wedge using a guidescope I can easily get round stars on 10 minute subs. We all have our preferences I guess.
Mark
Quote:
Originally Posted by multiweb
The trick is to move the imaging camera futher down the OAG so to reach focus you have to rack the focuser in, that means you have enough up and down play on your guider to slide it into focus. 
If you use a big scope that can handle the load OAG is the way to go. Otherwise you may run into flexure problems. |