P3D Re: Nimslo lenses

[Mark Shields <beamsplitter@xxxxxxxx>]

On Sat, 30 Oct 1999 08:10:29 -0600 "Jim Harp" <matmail2@xxxxxxxxxxxxx>
writes:

>Actually, I just used some  pliers to bend up the tab on the close-up 
>lense
>holder that's supposed to go into the hole drilled above the lenses in 
>a
>Teco-Nimslo.   I tape the close-up lenses on, but I think I'll follow 
>your
>lead and try to come up with something using velcro.  The Nimslo 
>close-ups
>really can be impressive, although it usually takes me a few tries to
>compose my shots correctly.  Do you have any tips for aiming the 
>camera?  
>Does the StereoType infinity lense cover all four lenses?  How close 
>does
>the camera focus when using the infinity lense? 
>Jim Harp
>
The StereoType infinity lenses are separate--one for each camera lens.
The closeups cover two adjacent lenses. While in theory this
may not be as good as using #1 and #3, I don't find any problem
with it in practice. (Before getting the StereoType lenses,
I experimented with a 49mm closeup over three lenses at a
time, so I've seen the effects.)

When shooting closeups I use the lenses closest to the
viewfinder, which eliminates horizontal parallax. Then 
vertical parallax is fairly easy to compensate for by
tilting the camera up a little bit, leaving a bit "too much" space
above the subject in the viewfinder.

The extreme closeups using the lens for 9 inches are still tough.
I've finally gotten one really good shot, and it was in bright
sunlight, which of course stops the main lenses down to give
more depth of field. I think I have another one that I haven't
mounted yet--also in bright sun. I use the long wrist chain I've
put on the camera to measure.

Portraits using the portrait lens are much easier--touch the
subject's nose with my extended hand for distance, and only
a slight correction for vertical parallax. These almost always
work, and are very impressive.

I don't recall the exact figures for the infinity lenses, but
I think closest focus is something like 15 feet, varying, of
course, with lighting conditions. I've made shots in bright
sunlight where I reaally couldn't tell the difference in
close objects between the outer lenses covered by the infinity
lenses and the center ones with nothing. Craig Daniels calls
these lenses "Scenics," because they make a big difference in
distant focus for scenic and building shots. I sent him a night
shot of a local train station, and he said he could count
every brick! Here the main lenses were wide open, so the shot
would have been impossible without them (the center images
without auxiliaries were noticeably fuzzy). They are -1/3 diopter.

Hope this helps!

Mark
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