[pure-silver] Re: 35mm (started with Film in Dektol)
- From: "Ralph W. Lambrecht" <info@xxxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Wed, 18 Nov 2009 18:49:40 +0100
Elias
I don't think, he said they 'have' less. He said they 'need' less,
which is correct.
Resolution test results highly depend on your test procedure, so,
absolute values have to be taken with caution, but if you keep all
other variables constant, you'll get a good relative comparison. Most
my Hasselblad lenses peak around 60-65 lp/mm. My Mamiya 6 lenses reach
up to 90 lp/mm. My Nikon lenses perform between 70-100 lp/mm. Maybe
better 35mm equipment (Leica?) could do better, but I'm afraid my film
is the bottleneck. I use Tmax-100 in ID11 1+1 with a 100:1 contrast
target. My estimate is that this combination is not able to give me
much more than 125 lp/mm anyway.
You see why my MF equipment runs circles around my 35mm equipment; not
much less resolution but less magnification in the darkroom.
Regards
Ralph W. Lambrecht
http://www.darkroomagic.com
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On Nov 18, 2009, at 13:15, Elias Roustom wrote:
MF and LF lenses need *less* resolving power than their equivalent
35mm lenses.
Tim, Thanks for bringing this up. I learned a lot. Also got a fun
exchange out of it on the Rollei list.
I'll run a test later this winter to compare my Rollei TLR glass
with some Canon FD glass - for the fun of it.
Then maybe I'll get a better idea why I like 135 in my MF gear so
much.
Elias
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