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Camera Projection Eyepiece
I have been testing a "Camera projection eyepiece" on my ED80 with a Nikon D70s attached. I got good results without it using just prime focus. But the attached picture shows the results with the projection eyepiece.
It is a 32mm eyepiece with a slieve over it with about 30mm of travel and a screw thread to attach a "T" adapter.
If I focus for the centre the edges are way out of focus and if I focus for the edge the centre is out. Is this normal? A fault, or is this what a field flattener is used for (I don't know how it would fit though).
Any thoughts and experience would be appreciated
Roger
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