Hey all, this something I just learned and just wanted to find out that if you know.
Apparently the correct way of inserting a barlow for imaging and viewing is into the back of the scope first, then the diagonal and then the eyepiece or webcam. Without doing this you will get aberration and slightly blurry pictures. This would explain why I cannot get perfect focus as i have been inserting diagonal, then the barlow and finally the webcam.
Anyone else doing this?