Thre's one other condition in that article at
http://www.photodo.com/art/35_m9.shtml
- unchanged depth of field. So if he used f/5.6 for 35mm film, he'd
use F/11 for 6x6 and f/22 for 4"x5"
Since many large format lenses, I believe, have maximum resolution at
f/5.6 or f/8, he'd have to use f/0.5 or f/1 on 35mm to compare. This
would skew results towards the 4x5 result for sure!
Since he uses f/22 for 4x5 (9x12cm) and f/5.6 for 35mm, he skews it
the other way, but even then the large format is sharper.
Usually depth of field is not the major consideration for
photographers. E.g. landscapes, sports, clubs. Also, large formats
can use swings & tilts to maximise depth of field.
It would be nice if Lars investigated the larger apertures too, and
sharper films like Technical Pan.
Tom
At 2000 March 26 - Sunday 14:24, Clyde Soles
spoke about *Re: [OM] Focus and resolution, manu...* saying
...
> "6) 9 x 12 with Sironar 150/5.6 at f22 and T-MAX 100. This image
> is > the sharpest one, but the difference to 35 mm is suprisingly
> small."
>
> Hmmm, seems to be a pretty major difference between 4 and 6...and
> that's just B&W. Throw color into the mix and the additional tonal
> information creates an even greater appearance of sharpness.
>
> There's a lot more to big film than simply less grain as they
> imply. Just as there's a lot more to a lens than a single MTF
> grade though they'd have you believe otherwise.
------------
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