The .31 meters is the distance from the film plane to the focus plane at
1:1.  If you subract the depth of the lens and camera body from the 12.2
inches, you get 5.9 inches.  Of course this is all IIRC.  The distance
limiter is "off" when set to .31m to infinity.  It is "off" in this
situation because it is not limiting the focus distance at all.

Mike


> If this lens allows you to select between the two options listed above, how
> do you focus all the way down to the minimum specified working distance of
> 5.9 inches in that .31m equals 12.204731 inches?  Can you turn the distance
> limiter off?
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