Re: thanks, and 2 more ?'s

[Ken Evans <kenevans@xxxxxxxxxxxxxxx>]

janet schowengerdt wrote:
 
> The only prominent questions for me now are:
> focusing (same or focus a little closer? isn't there a formula? i've
> heard different things...)

Janet:

	Older manual focus lenses, and better quality auto-focus lenses have an
IR focus point on them.  It is that little red dot on your
distance/depth of field scale.  When you get your focus point that you
can see, then look at the point that is lined up with your lens' center
line....and move that distance to line up with the red dot.  The IR
light spectrum focuses a tad closer than the visual light spectrum.  Put
your lens out on infinity, and then move back to the red dot to get the
general idea.  

	For most of what you will be doing, this is really not a real issue, as
most IR use is for outdoor scenics, where you are likely to be stopped
down for max. depth of field; however, if you are doing close-up or
macro work with IR this will become more of a critical focus need. 
Especially if you want to try IR for portrait work, which by the way is
rather amazing stuff.  Can be better than a face-lift for women, and can
clear up teenage acne.  IR, if used correctly, turns skin into fine
porclain!

Hope this helps....Ken
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