Quote:
Originally Posted by Merlin66
http://markishky.hit.bg/Mto.htm
You've probably found this link already. Your description is certainly astigmatism. Looking at the optical layout my attention would be on the positioning/ alignment of the element #5 this seems to be possible "guilty peson"
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Thanks..
Yes, I found it already...
I have not touch the field lens, though.. unless it moved somehow in the process of dismantling. I will definitelly have a good look at it.
Also, I suspect now that maybe something went in between main mirror (element #3 ) and its seat, so the mirror is now slightly tilted?
The worst thing is, I had so-so performance, but I tried to improve (because the lens was not good enough for a-photography as it was) ... and now I ended up with pile of glass and metal trash.