This is because Epson Perfection scanners are not really calibrated in the factory (well come on, they only cost $700). So for those seeking the best out of their scanner dollar (and lets fact it, you can't buy the Nikons anymore) we try to make the tools we have just that bit sharper than they are 'out of the box'
I thought I'd share with you the little shortcut I use to find the sweet spot. Its a stack of coins. In this case its the 5c coin.
Sticking them on the glass so that they hang over each other one can see pretty quickly where the focus point is.
Obviously coin 1 is on the glass ...
Its at coin 4 through to 5 that things appear their sharpest. So, now by measuring the coin thickness you can quickly set up your Better Scanning holders to get the best out of your film scans.
How much better?
Well about like this:
and this is a 100% crop of a 1200dpi scan of a slide which I wasn't really that happy with (crummy lens). Chalk and Cheese isn't it ...
Hmmm ... speaking of which, its time for some cheese to go with my red wine I think...