Digital BW, The Print

Problem discovered ! 
After a number of months of being very frustrated by the scan 
sharpness of my negs in the Polaroid glass carrier, I find out that 
the auto focus feature in SF does not work with the glass carrier 
(even though the focus button is on and therefore implies that it 
works.


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "frankg_photo" 
<fh.gross@s...> wrote:
> I know that all scans require some sharpening and that is a simply 
> a 'fact of life' - but how can I tell/measure/establish if my 
> particular scanner is achieving 'normal and acceptable' levels of 
> sharpness standards ?
> 
> I personally feel that the scans are all too soft but I've never 
> owned another and cant compare. I also dont know anyone else with a 
> similar film scanner to try the same neg or transparency elsewhere.
> Even with fine grain material like Kodachrome 25 or 64 the scans 
> appear too soft.
> 
> I prefer to have no sharpening filter on in the scanner software; 
> preferring to leave usm to the very end of the image editing.
>  And I make sure the auto focus is on (little 'target symbol' in 
the 
> centre of the scan frame) in the scanner software.
> I am using the Glass film holder to ensure a flat film plane.
> 
> Should I be seeing a crisp and sharp scanned image or is this 
> unrealistic ? Any ideas, suggestions ?
> thanks
> Frank