Archived posting to the Leica Users Group, 2001/02/07

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Subject: Re: [Leica] DOF DOESN'T EXIST! (was: how can the 75 Lux focus go bad?)
From: Johnny Deadman <>
Date: Wed, 07 Feb 2001 09:19:30 -0500

on 2/6/01 11:25 PM, Martin Howard at wrote:

>>> It is rather difficult to measure distance in a 2D print. I have a tulip,
>>> photographed at f/1.4, at the closest focusing of my 75mm lens (~2'.) The
>>> DOF
>>> is at best, the thickness of the surface skin (cells, protoplasm, whatever)
>>> of the tulip. I would measure this as a few thousandths of an inch.
>> I find that simply amazing.  As I said, this is my primary lense, and I have
>> thousands of images shot at ~3' and the DOF on ones I looked at tonight show
>> at least 1" or more, and the subject matter has detail enough (clothing
>> texture) to easily show this detail.
> There IS **NO** OBJECTIVE BASIS for depth-of-field!


Martin hits the bullseye!!!

Until you understand this you don't understand anything!!!!!

And people think Bokeh is voodoo!!

Go, Martin!!!!

- -- 
Johnny Deadman