Archived posting to the Leica Users Group, 2001/06/07

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Subject: RE: [Leica] 28 mm M Lens recommendation
From: "Austin Franklin" <darkroom@ix.netcom.com>
Date: Fri, 8 Jun 2001 02:19:16 -0400

> Ray.. the DOF is determined in the negative, not the print......

Well, it's actually worked backwards FROM the enlargement size...
 
> The DOF is the same for 2 different FL lenses, same F stop,  at the same
> NEGATIVE area.....

Em, ar, hum...pffft...ah...well...  I don't know about that.

55mm at f2.8 at 10m gives you 15.9m DOF using 0.06mm COC
110mm at f2.8 at 20m gives you 11.9m DOF using 0.06mm COC