Since the 70mm has a slightly smaller aperture opening at f/4.0 than the 
  85's, it should have a slightly greater DOF. However, since marked 
f-stops are never very accurate, it probably is within the DOF spread of 
the 85mm's.

-graywolf

William Robb wrote:
> ----- Original Message ----- 
> From: "Paul Stenquist"
> Subject: Re: M85mm f2.0 bokeh
> 
> 
>> Of course the 70 gives you more DOF. Thus, a bit crisper.
> 
> I left the camera position static and cropped the 70mm and 77mm images to be 
> similar to the 85mm images.
> As the camera: subject/background ratio wasn't altered, DOF should be 
> similar for all four lenses.
> 
> William Robb 
> 
> 

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