Options for Scanning 120 films ???

Started 2 months ago | Discussions thread
The Davinator
The Davinator Forum Pro • Posts: 24,140
Re: Options for Scanning 120 films ???
3

Barry Twycross wrote:

sybersitizen wrote:

Steven Seven wrote:

Have you tried experimenting with film holders? The image you posted is out of focus (I'd estimate it to have maybe effective 3MP, not 80).

I agree with your general point, but I think your 3MP estimate is off. Also, the posted example is a roughly 60MP image rather than 80MP.

I downsampled that photo to 3MP and again to 7MP, then upsampled both results back to the original resolution for on-screen comparisons.

Original on left compared to 3MP variant on right

Original on left compared to 7MP variant on right

Based on that, I think there's more like 7MP of usable resolution in the original scan. Still very poor for a file that contains 60MP.

I've never looked at this one that closely. This one may not be that sharp in camera, there are other shots where I can see a definite difference between a 15MP and 30MP version (using sybersitizen's method).

I'm going to have to revisit the scanning here. I have heard that focus on these scanners is an issue, but I've never worried about it, there's more than enough resolution for my purposes.

I wouldn't expect to get any more than 30MP or so out of one of these, given the photographer used 400ASA film (in 1994).

There is a fair bit of detail there.  Flatbeds benefit a great deal from enhancing acutance and texture.  Playing for a minute in Lr on my iPad from your original, shows a fair bit of detail...much more than 3mp or 7mp.  
I have found my V700 with the Betterscan holder and Kami fluid can pull a fair bit out for a large print.  When I need more, I have access to an Imacon 646.

This shows a fair bit more detail and acutance than the rather blurry comparisons previously mentioned.  I would play with adjusting the height of the film holder as the original scan was scanned slightly out of focus.

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