Re: [photo-3d] Re: Spicer mounting

["Dr. George A. Themelis" <drt-3d@xxxxxxx>]

Ralph writes:

>I just mounted another
>roll and had more problems.  On one, the perfs were visible because one film
>chip had slipped off the pins.  I caught it before taping.  I now am VERY
>careful to check the chip outline on the spicer mount before taping.  The
>perfs should be parallel to the edge.  

I have ran into the problem of chips falling off the rails before.
In one extreme case I had to tape one chip because it was
impossible to flip the mount without the chip falling off its
place.  I noticed that there is some variation in the size
of sprocket holes.  Sometimes you get a more lose fit but
usually the fit is tight.  HAVING THE CHIP AS FLAT AS POSSIBLE
is a must!  If the chip has a curvature, it tends to pull
out of the rail.  So it is important to flatten the roll
before start mounting (this is usually done by reverse rolling
the roll to remove the natural curl).

I am in the habit of freeviewing the chips when the RBT
mount is flipped over the Spicer mount.  I check the alignment
this way.  That's why this operation is done over a light
table.  I mentioned earlier that a proof of the power of this
method is that it can be done without a light table.  In this
case you cannot view the pair.  I did that while mounting on
the train and did not have any problems, but it is generally 
desirable to use alight table and check the alignment before
taping the chips, just in case something has gone wrong.

If you cannot freeview easily you can try one of these
aids: 1) strong reading glasses, 2) lenses that attach
over your head and flip in and out of the way (Ron Labbe
used to sell this device), 3) Lenses attached to the light
table that can flip in and out (like in the SAM), 4) a
viewer like the modified Radex (with the diffuser removed)
as DrDave has suggested.

>The lenses are heavy, though.  (These are Zenitar 16mm f/2.8 in 
>Pentax K mount available from russianplaza@xxxxxxxxxxx 

Doesn't Steve Berezin carries these also?

George Themelis