You are making sure to use "film with film holder" in the settings, correct?
Viewscan does not have that option to choose. Apparently there is a way to do that, that isn't labeled as such. One thing I did find out, is that there is a film scan guide bar that you put in the calibration area if you want to scan film directly off the scanner glass. You use it with 8x10 film, but it will work with any. This bar causes the scanner to focus on the scan glass and not above it. Also, if you choose scan transparencies it automatically uses the higher resolution camera which can give you the theoretical 6400dpi. If it is set to print it will use the "lower" res camera which gives you a max of 4800 dpi. At least that is what I read.
I do have some scans using the Betterscanning and Epson fluid mount that are very sharp. Just when I swapped out the scanner for the replacement that was sent to me I ran into the focus issues.
On the Input Tab next to the Mode option there is a drop down list.
Transparency should be selected when using a film holder including the Epson Wet Mount holder. This will select the high resolution lens and have a narrower scan area down the centre.
Transparency 8x10 should be s elected when scanning direct on-top of the scanner glass. This will select the lower resolution lens and have a wider scan area.
When you choose transparency it changes lenses. It changes to a longer focal length lens (which should have a narrow depth of field) that is focused slightly higher about the glass.
Both lens are wide angle lens with fixed focus AFAIK. The pixel density never changes, even when you change resolutions.
Last edited by Ted Baker; 28-Mar-2018 at 14:46.
According to the V850 manual you put this plastic piece in calibration area and it simply imforms lens to FOCUS ON the glass and not above it. It makes no mention of a hi resoultion or low resolution lense being chosen. When I read that and the specs on what a transparency can be scanned at, I think you get hi res lens on scanner glass and above glass in a holder and they just change how much of the sensor is active on scanning based on whether or not you use the scan guide they give you with scanner.
Very interesting topic. Would be cool if we could get the actual functioning directly from Epson.
the service manual shows the two lens and how they are setup with the mirrors etc.
https://www.manualslib.com/manual/10...e=11&term=warm
They are fixed focus according to the service manuals.
Well that settles that. They say high resolution not low though. So I would guess there should be similar performance as you just need a wider angle lens for greater coverage.
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