[Leica] new Puts article

[jblack at ambio.net (John Black)]

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>
> "DOF is inversely proportional to format size"
>
<bigger snip>

Back when I used a Oly Pen F extensively, the only lens worth much in the
system was the wonderful 38/3.5 Macro (I may be off on the numbers, but it
was a normal range, slow macro).  That lens was a great favorite of mine for
macrophotography of small flowers and insects because, I swear, I could get
more DOF than with normal lens macros in full 24X36 format.

For those of you unfamiliar with the Pen F system, it was a very innovative
interchangeable lens SLR using half-frame format size (18X24). Most of the
glass made for it was forgettable ranging from average to poor, but the 38
macro was a star performer. Format about the same size as a 1.6X sensor.

JB