Is it normal for my Skywatcher ED80 Pro Series (Skywatcher 1:1 focuser) to not get into focus with a GSO 2" (Or the small GSo Plossl) Eyepieces directly place into the back of the focuser??
I try to back off my Eyepieces and I can get the image into focus but the focuser wont be holding the eyepiece at all...
Thanks for your reply... Do u mean they design it so that it wont get into focus??? and will 80mm extension works well for it??
The design works fine for those of us who image through them. But not so good for visual.
If you have an 80mm ext tube, give it a go, there's only one way to find out eh. I use a 50mm one for mine.
When I use to use my ED80 visually (which was rarely) fortunately I had a 2" Barlow that I didn't use so I just unscrewed the lens from it and used the rest as a 2" extension tube.
Then I discovered that the ED100 focuser is a perfect fit and is waaayyyyy longer so it is great for visual work in the ED80
That gives you 2 options: Extension tube or ED100 focuser.
For not much more money than an extension tube IMHO you would be better off with a diagonal. It will make your observing position generally much more comfortable.
Allan, given refractors are normally pointed upwards, it makes sense that they are designed to include a diagonal in the light path - for ease of viewing. That's what I think, anyway.
I use a 50mm one for mine.
