Archived posting to the Leica Users Group, 2011/04/11

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Subject: [Leica] DOF of 80/1.4 at 1.4 slimmer than 50mm at 1.4?
From: afirkin at afirkin.com (afirkin at afirkin.com)
Date: Tue, 12 Apr 2011 01:33:55 -0400
References: <747098.9554.qm@web82101.mail.mud.yahoo.com> <BD38DC430E434F79B63832050B44DA53@jimnichols> <BANLkTinCi_aYvnyQwfM+g=DF=yB+4gFX4Q@mail.gmail.com> <BLU0-SMTP63FFBE73F8419F8D7EEA128CA80@phx.gbl>
 
> Hello
>
> I've been playing with my DMR with the 80mm f1.4.
>
> I'm finding it a lot more difficult to use and capture proper focus at
> f1.4 than I expected.
>
> Is the dof of an 80mm at f1.4 thinner than the dof of a 50mm at f1.4?
>
> And is this typical of what people found, using their rf 75mm Summiluxes
> - very difficult to capture proper focus?
>
> I suppose it didn't help, trying to photograph a 7 month old boy, who
> doesn't quite understand sitting still yet   :-)
>
> Vick

80 f1.4 is much shallower than the 50 in my experience with the Zeiss
lens. I think we are all more "critical" of focus etc with digital:
usually we never blew the 'snaps' up on a 30inch screen!!!!

Alastair
Replies: Reply from gpinkcp at msn.com (Gary Pinkerton) ([Leica] DOF of 80/1.4 at 1.4 slimmer than 50mm at 1.4?)
 In reply to: Message from rgacpa at yahoo.com (Bob Adler) ([Leica] IMG: Foothill Park)
Message from jhnichols at lighttube.net (Jim Nichols) ([Leica] IMG: Foothill Park)
Message from richard at imagecraft.com (Richard Man) ([Leica] IMG: Foothill Park)
Message from vick.ko at sympatico.ca (Vick Ko) ([Leica] DOF of 80/1.4 at 1.4 slimmer than 50mm at 1.4?)