[Leica] Q about Summicron 2/50 tab version

[richard-lists at imagecraft.com (Richard)]

Hi Philippe, I asked a similar Q way back when since there IS a slight 
difference in distance when you focus and reframe, however small. Among 
other people, uncle Ted basically answered that "just focus and shoot and 
don't worry about it." So I just focus and shoot and not worry about it. In 
my experience of shooting a lot at F1.4 to F2, any focusing error is mine. 
Some times due to the lighting and the patch is not as clear as it can be 
or fast motion, I know I am "guessing" a bit and those are the ones where 
the focus may be slightly off. When I think I nail the focus, then it does 
seem that way. I use. the .72x VF and although I have the 90/2AA, 95% of my 
shots are the 35/50 combo. My eyesight is not the greatest and while I 
don't need glasses to drive, I definitely need reading glasses to read 
anything "small." :-(

FWIW

At 08:21 AM 12/30/2004, Philippe Orlent wrote:

>Dear Luggers,
>
>I have been shooting a lot with this lens lately (serial #3166XXX), both on
>Agfa Scala and on Kodak BW400CN. Whilst scanning I discovered that a lot of
>my shots are not tack sharp when taken wide open at f2.
>
>Could this be due to the fact that I tend to focus and then reframe (in
>portraits f.i.)? In other words, is this lens known to be sharp in center,
>but slightly off focus at the edges (+ also slight vignetting)?
>
>Or is this due to the narrow DOF when wide open: a difference of an inch or
>so after reframing, resulting in not being razorsharp?
>
>Ofcourse it could also be that my RF isn't set accurately, but I doubt this,
>since the camera was CLAd 2 months ago by one of the few technicians left in
>my area that know how to handle these beauties.
>
>I'm slightly short sighted (-0.5 dioptry), but I also doubt that this has
>any affect on focusing accurately at about 1 to 2 metres.

// richard (This email is for mailing lists. To reach me directly, please 
use richard at imagecraft.com)