Can't Focus DSI or Webcam in Newtonian

Hi,

I have a DSI PRO and a webcam which I'm trying to use for auto guided imaging. I was initially planning on guiding with my Orion 80 ED APO and taking photos through my 8" f/5 Newtonion and vice versa. The problem is, neither my webcam nor my DSI can reach focus in the Newtonian as there doesn't seem to be enough in-travel. I believe I am within 1/2" of focus when I reach the end of the tube's travel.

Is there anything I can do to correct this other than just buying a new scope?

There are two solutions, one kinda drastic and the other not so much... First, try cranking your collimation bolts all the way in. If this doesn't work, you'll need to move the mirror up the tube a bit (this is the drastic version).

there is another possibility as well, but it may not meet your needs. You can try putting a barlow in the path. I actually need to double-barlow to get my camera to focus.

Good luck!

Pat

you could also try an extension tube attached to your camera.