|
Yes eyepiece projection is what I am trying to achieve. Afocal seems easy enough, be it a different thing to projection.
You are correct the projection becomes more and more difficult as you increase the projection length. I am trying to keep it no longer than 3-4cm about 2 of which is inside the camera. This seems to work relatively ok and gives a nice magnification as well.
I thought about few low power eyepieces.
Though I am still puzzled why the 42mm isn't focusing as it is in perfect focus visually. Then even a short 4-5cm (max) projection and it goes all weird and out of focus. The image seems quite bright it just won't focus on the camera sensor. If I look straight through the eyepiece even at the distance of the projection I can see the image perfectly.
It really confuses me, it "should" work. Especially since using my 13mm Plossl in almost the exact same way works perfectly be it a bit dim at times.
I think I have the only telescope I know that has no prime focus thread. I have a few adapters and things but the focus of the scope is a bit short.
I think I might need to shorten the tube or more likely obtain a nice CCD camera that can be used in place of the eyepiece.
If nothing else tinkering around with these ideas are helping me understand my scope a bit more.
|