Re: [photo-3d] Re: Ricoh XR10M Synch

["Allan Griffin" <agriffin@xxxxxxxxxx>]

George,

While there are those who think auto focus is just the 
money, even with a twin SLR stereo rig, there are others, 
like me, who prefer to do as we always did before the days 
of auto focus - we simply figure the distance and depth of 
the zone in which we estimate the action will be happening
and PRE-FOCUS.  In fact, with the type of action that I like 
to shoot, I like to put the centre of focus 1/3 into the estimated
zone of focus and just take stereos.  Besides, all my gear is 
from the pre-auto-focus era anyhow and I don't intend to go 
buy new stuff.  On top of that, I don't believe that focusing on 
the front of a plane gives one the best depth-of-focus range.
Even with 135mm lenses and the action centre-of-focus at say 
60 ft to 80 ft, stere is quite nice dof at say f5.6 or f6.3.

But then, the above is only my opinion.  Auto-focus fans are 
entitled to believe that the latest gear has to be better, even 
with stereo.

Allan    

----- Original Message ----- 
From: Dr. George A. Themelis <drt-3d@xxxxxxx>
To: <photo-3d@xxxxxxxxxxx>
Sent: Friday, April 21, 2000 3:43 AM
Subject: Re: [photo-3d] Re: Ricoh XR10M Synch

George Themelis wrote:

> >I don't understand how you can shoot fast moving subjects 
> >if you have to focus both cameras manually. 
> 
> No problem if the subjects are moving ON the focus plane.
> 
> Example:  In Sea World I took pictures of moving whales
> dolphins and trainers, with twin Minoltas X700 and 135mm
> lenses.  The subjects were moving up and down but they
> were at a constant distance from me.
> 
> George
> 
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