Archived posting to the Leica Users Group, 2009/02/06

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Subject: [Leica] Is the DOF using a digital sensor any different than thatof film?
From: sethrosner at nycap.rr.com (Seth Rosner)
Date: Fri Feb 6 04:44:21 2009
References: <BLU0-SMTP504288C23B0AA68D8D767D8CC00@phx.gbl> <9b678e0902051925v4dd7d486pd58bff41a6434fae@mail.gmail.com>

Don wins best answer prize !

Don, check is in the mail         ;-)

----- Original Message ----- 
From: "Don Dory" <don.dory@gmail.com>
To: "Leica Users Group" <lug@leica-users.org>
Sent: Thursday, February 05, 2009 10:25 PM
Subject: Re: [Leica] Is the DOF using a digital sensor any different than 
thatof film?


> Vick,DOF depends on focal length of the lens, aperture used, and distance 
> to
> subject, and the degree of enlargement to some extant.  So, with a crop
> sensor you tend to use a wider lens at a greater distance than that same
> focal length on a 24x36; ergo greater apparent DOF.  On the other hand, if
> you use the same focal length at the same aperture at the same distance 
> and
> enlarge the same then the same apparent DOF; you will however get a
> different perspective as the crop sensor will not include as much of the
> scene.
>
> On Thu, Feb 5, 2009 at 5:26 PM, Vick Ko <vick.ko@sympatico.ca> wrote:
>
>> Is the DOF using a digital sensor (e.g M8, Pana G1) any different than 
>> that
>> of film?
>>
>> In a question on Rangefinder forum, I was asking about using the Pana G1 
>> as
>> the most economical way to play "digital M", and got into a discussion on
>> "loss of DOF" with digital sensors.
>>
>> I never understood that. With a crop sensor, isn't it just like shooting
>> with a third of the 36 x 24mm frame covered?
>>
>> The razor thin DOF of my Noctilux is still razor thin, just that the 
>> image
>> that I'm taking is like cropping it to that of a 100mm lens. Or, to think 
>> of
>> it another way, my Noctilux becomes a 100mm f1 portrait lens, a focal 
>> length
>> that once was considered close to perfect for portraits.
>>
>> And fortunately, with the Panasonic, I see what I'm framing.
>>
>> Isn't that so, about the DOF?
>>
>> regards
>> Vick
>>
>> _______________________________________________
>> Leica Users Group.
>> See http://leica-users.org/mailman/listinfo/lug for more information
>>
>
>
>
> -- 
> Don
> don.dory@gmail.com
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information


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In reply to: Message from vick.ko at sympatico.ca (Vick Ko) ([Leica] Is the DOF using a digital sensor any different than that of film?)
Message from don.dory at gmail.com (Don Dory) ([Leica] Is the DOF using a digital sensor any different than that of film?)