Quote:
Originally Posted by spaceboy0
Here are pics of my setup; sorry about the blurriness in the first one. I'm using a 2 x barlow. The lens is screwed out of it to show you. I cannot attach the whole 2 x barlow into the camera adapter as it makes the 18 mm eyepiece stick out too far such that it would hit the camera's reflex mirror so I just screw the 2 x lens into the 18 mm eyepiece or whatever eyepiece I'm using.
I can't get Saturn or the Moon or anything at Infinity into focus. And as you see in the second photo, the foruser is racked in all the way. I want to be able to use a 9 mm eyepiece with the 2 x barlow on Saturn.
How about I use .96 eyepieces? Does a .96 eyepiece give a different focal point geometry? Help me?!
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It looks as if you have the Barlow lens assembly in the focuser and the camera adaptor inserted into the back end of the Barlow.
If an eyepiece in place of the camera adaptor shows a focused image at the same focuser setting, then the film in the actual setup is 3 or 4 inches behind the focus. If you could rack the focuser in enough farther with the Barlow in place, you might be able to move the focus out to the film, but the optical correction might suffer in the process.
My hunch is that the camera adaptor was intended to be used with a typical Schmidt-Cass, with which you easily can move the focus back many inches to reach the film. I don't see any way to make this Newtonian reach the film in this setup without remounting the primary mirror farther up in the tube. Then you will need some sort of extension tube to move the eyepiece out for visual use.