Ashley at Precise Parts in Miami is great for creating a custom made anodised aluminium adapter. He could make one for your camera to fit your focuser. Putting a nice camera like that in a screw tightened focuser is asking for trouble.
Yes 50 seconds shows no differential flexure but it would also still show tilt which affects any exposure no matter how short.
A heavy camera in a screw tightened focuser is unlikely to be square.
But as you point out it may well be something else but even if collimation is out tilt still appears to be present. Perhaps both problems exist.
Greg.
Quote:
Originally Posted by Paul Haese
Good points Greg. I checked my images from 50 seconds (the ones I used to setup framing) and the stars are the same shape. That certainly is not flexure, so it means something is not right on the image plane.
I just have to go through and check a few things now. One for certain is to ease off the collimation screws a bit and recollimate but keep the screws loose. I am thinking that the secondary might be warped a little, so just need to check that.
Greg I am not using screw adapter between the focusor and camera connection. The OAG is incorporated into the camera, so I need to get a handle on this I think. Other people have got that sorted. The spacer that I put in to get focus might also be affecting the stars too. It might need shimming.
Everything is an evolution and I thank you all for your comments and suggestions.
|