Originally Posted by
Kevin Crisp
The scratch marks in my experience are present on all of them that have been used.
I do have one back that I went whole hog on. A mid-grade Maxwell screen. But because of the unusual backwards arrangement Bill M. told me I had to have the back machined to have an accurate plane of focus. I did that. I must have been into it for $500 and I guarantee you it would be much more now.
So I suppose the question is: replace it with what? If you put in a new gg, with a fresnel that isn't an Ektalite, you may (and veryu likely will) have a plane of focus issue.
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