Archived posting to the Leica Users Group, 2006/11/01

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Subject: [Leica] M8 & Depth of Field
From: walt at waltjohnson.com (Walt Johnson)
Date: Wed Nov 1 06:05:16 2006
References: <002201c6fdb0$fecc2160$2101a8c0@luispersonal>

Luis

Lee nailed the DOF question to the barn door. I hadn't heard it 
explained like that in many years and it brought back vague memories of 
photo class. Now when I go out to shoot I'll be thinking about squeezing 
light rays instead of making images. :-)

Walt

Luis Ripoll wrote:

>Hi to all the messages John, walt, Heining, Adam, Leon, Didier...
>
>Once I've read the different opinions I think that DOF is a relatively
>concept, the illusion of sharpness diminishes when you enlarge a picture,
>but accepting this relativity, what I think that's evident that every format
>has his own lenses designed for based as standard or normal lens the
>equivalent to the diagonal of the format. If we use a 50mm lens on a smaller
>format that's would imply a decrease of DOF if we take a picture of a
>subject at the same distance, on other words, a 50mm will become a "short"
>tele and consequently at the same distance and aperture the DOF will
>decrease. On the case, if you take the picture at more distance, due to the
>small tele effect, I think that DOF will decrease too, based on the
>relatively concept of DOF you have cropped the picture area and will obtain
>consequently less DOF.
>
>Thanks for your all interesting opinions,
>
>Saludos desde Barcelona
>Luis
>
>
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>  
>

In reply to: Message from luisripoll at telefonica.net (Luis Ripoll) ([Leica] M8 & Depth of Field)