I've been using an M1 Pro to scan some 8x10 Ektachromes for a friend. That is the limit of my experience with it so far.
Re Newton's Rings
I've seen a few on the dry-scanned 8x10s taped to the glass, emulsion side up. They come from the glass/film base gap. If this was my scanner I'd buy an AN glass for the glassless carrier, and scan all sizes of film on the glass.
General
The glassless 'main carrier' was very badly warped, and is being replaced by Microtek. I had to remove the top glass to get it out on one occasion. It's easy to remove the top glass for cleaning the innards.
Green Rays
The scans had a few green bands running lengthwise. Easy to remove in Photoshop, but they shouldn't be there. I was using the latest Silverfast download, with Windows XP on a MacBook.
Performance
I've written more in another thread - I meant to post it here, but it is here (link).
In practice I found that it could do a good job of recovering shadow detail from Kodachromes. That's about as much as I need to know in that respect.
I haven't yet had time to print some tests to show what degree of enlargement is acceptable to me. That's more important to me than a simple resolution figure.
I will go back and do a side-by-side with a 4x5 negative that has been scanned on an Imacon 949. I already know that the Imacon scan is going to have better 'effective resolution'* at 2040 ppi than the M1 at 2400 ppi, unsharpened. What it means in practice to a photographer other than myself is more difficult to quantify.
Best,
Helen
*ie what I can end up with on a print
Edited out of original post, but not before Ted had seen it and spent his time writing a reply: a comment about the use of spi and ppi.
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