Archived posting to the Leica Users Group, 2011/04/13

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Subject: [Leica] DOF of 80/1.4 at 1.4 slimmer than 50mm at 1.4?
From: Frank.Dernie at btinternet.com (Frank Dernie)
Date: Wed, 13 Apr 2011 09:21:39 +0100
References: <747098.9554.qm@web82101.mail.mud.yahoo.com> <BD38DC430E434F79B63832050B44DA53@jimnichols> <BANLkTinCi_aYvnyQwfM+g=DF=yB+4gFX4Q@mail.gmail.com> <BLU0-SMTP63FFBE73F8419F8D7EEA128CA80@phx.gbl> <476BA3A4-0AC3-4E8C-8B55-B586467EEF9B@btinternet.com> <91AB7555-0351-45BB-A8F2-1D7FF81A9F0E@gmail.com>

Hi Lluis,
there is not much difference between Noctilux and 75mm f1.4 but on balance I 
would say that with the 75mm I mis-focus a little more often. I do not blame 
the lens...
Frank D

On 12 Apr, 2011, at 22:23, Lluis Ripoll wrote:

> Really Frank?
> 
> A Summilux 75 is more difficult to focus than a Nocti (both wide open) ?
> 
> I've never tried a Nocti, I love the fine focusing of pictures I've saw 
> from Steve, Rei and others, as well the creamy effect, and I usually 
> discarded it from my thaughts thinking that it would be very difficult to 
> focus, I use the Lux 75, it is not easy properly focus at 1.4 but not 
> impossible.
> 
> Saludos
> Lluis
> 
> 
> El 11/04/2011, a las 14:35, Frank Dernie escribi?:
> 
>> 
>> On 11 Apr, 2011, at 12:41, Vick Ko wrote:
>> 
>>> 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?
>> 
>> Yes, noticeably.
>> 
>>> 
>>> And is this typical of what people found, using their rf 75mm Summiluxes 
>>> - very difficult to capture proper focus?
>> 
>> More difficult than a Noctilux, but not impossible.
>> 
>>> 
>>> I suppose it didn't help, trying to photograph a 7 month old boy, who 
>>> doesn't quite understand sitting still yet   :-)
>> 
>> Fast lenses wide open with children is a 1 in 50 strategy...
>> 
>>> 
>>> Vick
>>> 
>>> _______________________________________________
>>> Leica Users Group.
>>> See http://leica-users.org/mailman/listinfo/lug for more information
>> 
>> Frank
>> 
>> 
>> _______________________________________________
>> 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



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?)
Message from Frank.Dernie at btinternet.com (Frank Dernie) ([Leica] DOF of 80/1.4 at 1.4 slimmer than 50mm at 1.4?)
Message from lluisripollquerol at gmail.com (Lluis Ripoll) ([Leica] DOF of 80/1.4 at 1.4 slimmer than 50mm at 1.4?)