Re: [Leica] Focus Kindergarten

[John Collier <jbcollier@home.com>]

Hmmm, my M camera has that too. It is called an "aperture ring" that is
coupled to a "diaphragm" that is actually inside the lens!! When you turn
the "aperture ring" it also opens or closes the "diaphragm" (no batteries
required!). When the "diaphragm" is wide open, you get a very narrow plane
of focus. When the "diaphragm" is closed to a small hole, you get a wide
plane of focus!! Wait....it even gets better. There is a scale engraved on
the lens that shows you what will be in focus at the various apertures.
Amazing but true!!

John Collier  ;-)

> From: ralph fuerbringer <rof@mac.com>
> 
> canon eos focus feature on all current models beats auto showing of depth of
> field described below on the new contax n1. eos's  is apparently patented as
> no other system as far as i know lets you focus on the near then the far of\
> what you want in focus, instanteously setting the lens for that result.
> a nifty offshoot of this is of course minimum focus, to isolate the subject
> with lack of dof.  for an environmental portrait in a messy setp you
> focus on nose and ear and mess becomes not just tolerable sometimes but
> sometimes as soft and attractive as the shape of your iris allows.