Archived posting to the Leica Users Group, 2009/02/07

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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: Sat Feb 7 05:22:31 2009
References: <BLU0-SMTP504288C23B0AA68D8D767D8CC00@phx.gbl><9b678e0902051925v4dd7d486pd58bff41a6434fae@mail.gmail.com><BLU0-SMTP472FC431CEE402999C8AAB8CC10@phx.gbl><4cfa589b0902061752h78cf5434t1463edeebf766efd@mail.gmail.com><F46DBF5D-217F-4700-B586-0548289A497C@mac.com><328D0131D1C4477ABF8F1E596F2EBF75@jimnichols><5DF476A4-3966-4483-9422-72118350C227@mac.com><CD6A702A-8C56-4477-88A9-41DB82BC4DB5@mac.com> <p06230901c5b2f60ddd29@[10.0.1.199]>

Henning, I've never done LF but as I have always understood it, DOF doesn't 
relate to format size but to the lens' focal length and the distance of 
subject to film plane.  So I don't understand the Sinar DoF scales relating 
to formats. On the other hand, a combination scale would make sense.

----- Original Message ----- 
From: "Henning Wulff" <henningw@archiphoto.com>
To: "Leica Users Group" <lug@leica-users.org>
Sent: Saturday, February 07, 2009 3:29 AM
Subject: Re: [Leica] Is the DOF using a digital sensor any different than 
thatof film?


> At 10:47 PM -0600 2/6/09, George Lottermoser wrote:
>>And when i worked with a specific view camera lens
>>it never occurred to me
>>to ask if the DOF changed
>>when I changed the back
>>from 8x10 to 5x7 or 4x5 or 6 cm x 9 cm.
>>
>>DOF does not change
>>with a format change.
>>DOF changes only with
>>a change of f:stop or
>>with a change in distance
>>between the lens and the plane of focus.
>>
>
> George, you've used a Sinar, haven't you? On the depth of field
> scale, attached to the rear fine focus adjustment, the DoF scales are
> there for 4x5 or 5x7 or 8x10, or there is a combination scale.
> They're different for each format.
>
>
>
>>Regards,
>>George Lottermoser
>>george@imagist.com
>>http://www.imagist.com
>>http://www.imagist.com/blog
>>http://www.linkedin.com/in/imagist
>>
>>On Feb 6, 2009, at 10:26 PM, George Lottermoser wrote:
>>
>>>  When I worked more with view cameras a loupe on the ground glass
>>>gave me the information I needed.
>>
>>
>>_______________________________________________
>>Leica Users Group.
>>See http://leica-users.org/mailman/listinfo/lug for more information
>
> -- 
>
>    *            Henning J. Wulff
>   /|\      Wulff Photography & Design
>  /###\   mailto:henningw@archiphoto.com
>  |[ ]|     http://www.archiphoto.com
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information


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Replies: Reply from henningw at archiphoto.com (Henning Wulff) ([Leica] Is the DOF using a digital sensor any different than thatof film?)
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?)
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 abridge at gmail.com (Adam Bridge) ([Leica] Is the DOF using a digital sensor any different than that of film?)
Message from imagist3 at mac.com (George Lottermoser) ([Leica] Is the DOF using a digital sensor any different than that of film?)
Message from jhnichols at lighttube.net (Jim Nichols) ([Leica] Is the DOF using a digital sensor any different than thatof film?)
Message from imagist3 at mac.com (George Lottermoser) ([Leica] Is the DOF using a digital sensor any different than thatof film?)
Message from imagist3 at mac.com (George Lottermoser) ([Leica] Is the DOF using a digital sensor any different than thatof film?)
Message from henningw at archiphoto.com (Henning Wulff) ([Leica] Is the DOF using a digital sensor any different than thatof film?)