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

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Subject: [Leica] IMG: Dune View
From: richard at richardmanphoto.com (Richard Man)
Date: Sun, 13 Jul 2014 17:27:28 -0700
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>

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.


On Sun, Jul 13, 2014 at 5:06 PM, George Lottermoser <
george.imagist at icloud.com> wrote:

> Thanks for confirming my assumptions Bob.
>
> As someone who spent most of his commercial career, and a good deal of his
> "fine art" career, behind a view camera ground glass I can't help wondering
> why the ground glass and loupe doesn't "work better."
>
> Does it come down to the size of the ground glass image being two small
> for your comfort?
>
>
> a note off the iPad, George
>
> On Jul 13, 2014, at 5:26 PM, Bob Adler <rgacpa at gmail.com> wrote:
>
> > Well yes, but it stinks. I use it to compose only. Some degree of
> focusing is possible, but you have to stop down or use a ND filter so the
> CCD doesn't bloom. Very grainy, heats up the sensor, and eats batteries.
> >
> > A recent firmware update now allows the use of USB with the back. I
> tether the back to the surface and run Capture 1. Fire off a shot and then
> look at the raw file on the surface a few seconds later. Double tap the
> Surface screen and view where you tapped at 100%. Double tap and back to
> the full image. The Surface only weighs 1-3/4lb. I also use focus mask and
> the two together greatly simplify tilt. Still use a dark cloth as the
> Surface's screen is shiny. Also helps with errant light between the Lee
> filters, especially the 10ND.  I have a holder for the Surface on a tripod
> leg. Plastic and weighs nothing.
> > Bob
> > Sent from my iPad
> >
> >> On Jul 13, 2014, at 8:27 AM, George Lottermoser <
> george.imagist at icloud.com> wrote:
> >>
> >> You don't actually have live view from that CCD... do you?
> >>
> >> So you're checking actual exposures on the Surface 3?
> >>
> >> a note off the iPad, George
> >>
> >> On Jul 13, 2014, at 10:12 AM, Robert Adler <rgacpa at gmail.com> wrote:
> >>
> >>> Microsoft Surface 3 (my new 8x10 GG) - It did allow me to get rid of my
> >>> ground glass and loupe!
> >>
> >> _______________________________________________
> >> Leica Users Group.
> >> See http://leica-users.org/mailman/listinfo/lug for more information
> >
> > _______________________________________________
> > Leica Users Group.
> > See http://leica-users.org/mailman/listinfo/lug for more information
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>



-- 
// richard <http://www.richardmanphoto.com>
// http://facebook.com/richardmanphoto


Replies: Reply from george.imagist at icloud.com (George Lottermoser) ([Leica] IMG: Dune View)
Reply from john at mcmaster.co.nz (John McMaster) ([Leica] IMG: Dune View)
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)