Archived posting to the Leica Users Group, 2014/07/13

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Subject: [Leica] IMG: Dune View
From: george.imagist at icloud.com (George Lottermoser)
Date: Sun, 13 Jul 2014 19:39:42 -0500
References: <CAAsXt4MK=pHAuUdKQcpZO5_7Y00o6RWk8iEn8=0uVyZ+d5yTVg@mail.gmail.com> <CAF8hL-EOK7P7XWsCi49DVzyHWUixgWfW_b5fCdTa1u8bsL=3JQ@mail.gmail.com> <CAAsXt4NEpY7brVkxG7b9jHFS8fvJCDpe_y7bCfaSw3yF2B+yFA@mail.gmail.com> <F0518784-CDA2-4042-AA85-577F7268A274@icloud.com> <5179DBEF-E233-4948-BD29-864BEFCF7EAE@gmail.com> <4CF1B0DA-8CE6-4B2D-8621-30EF141D9C99@icloud.com> <CAF8hL-H1oNN20yRw51fZsf-QV63sG8b+TjG85kW459GwbAR1JQ@mail.gmail.com>

Yes. Though we regularly focus our DSLRs. I've focused my 'blad 500cm with 
the 40mm when using a CVF 39 back quite successfully. I'm currently playing 
with a Cambo sliding back - hoping one day to putt a digital back on it - on 
my Ultima - though don't have a back to check with (yet). May simply be what 
we're "used to."

All making for interesting times - these.

a note off the iPad, George

On Jul 13, 2014, at 7:27 PM, Richard Man <richard at richardmanphoto.com> 
wrote:

> George, remember that the "full frame" digital medium back is still "only"
> about 48mmx33mm (may be slightly larger). Ground glass generally is not
> sufficient for the critical focusing accuracy that the digital sensors
> require. Diffraction set in at about F16 or so for most lens for that
> format and the massive resolution is unforgiving to focusing error.


In reply to: Message from rgacpa at gmail.com (Robert Adler) ([Leica] IMG: Dune View)
Message from richard at richardmanphoto.com (Richard Man) ([Leica] IMG: Dune View)
Message from rgacpa at gmail.com (Robert Adler) ([Leica] IMG: Dune View)
Message from george.imagist at icloud.com (George Lottermoser) ([Leica] IMG: Dune View)
Message from rgacpa at gmail.com (Bob Adler) ([Leica] IMG: Dune View)
Message from george.imagist at icloud.com (George Lottermoser) ([Leica] IMG: Dune View)
Message from richard at richardmanphoto.com (Richard Man) ([Leica] IMG: Dune View)