I have not seen much about the practicalities of slide
duplication with the Olympus bellows and slide duplicating
attachment....
I just came back from Armenia and some of the slides I took need
to be copied and I DONT DARE send them out for commercial slide
duplication; so, I decided it was time to learn about this
almost lost technique.....
The local camera store has 'Ektachrome slide duplicating film for
35mm type 5071. It is not very expensive and - unlike most of
the dupe films, is available in standard 35mm 36 exposure. (most
others are in BULK rolls - not as practical for a consumer).
This film is balanced for tungsten so I bought a 3200k lamp ($3)
and put it in a cheep silver lamp holder ($3) from the local
hardware store at Kodak's suggestion.
Put OM2n on tripod with bellows, double cable release. slide
duplicator and 80mm macro bellows (but 50mm will work too). The
tungsten bulb was clamped 18 inches from the lens at the same
level as the camera....
So far so good.... Now the film's fine print - after several
calls to Kodak and my local camera pro store (Calumet).... the
film box says EI32 (so set the asa to 32) and +10c +20y which
means add gel or acrylic filters 10 cyan and 20 yellow as a
STARTING FILTRATION GUESS for this batch of film!
Since I wanted to make exact dupes, I knew I would have to play
around - but once you get the correct exposer time and filter mix
for the light, batch of film, and camera - then, evidentally, it
will not need to be changed......
Anyway,I shot a role on auto, bracketed with the OM2n exposure comp dial
and processed it E6. The resulting first attempt had contrast and
focus best with this OM2n at asa32 with compensation dial set at
+1 and 80mm lens set at F22 - but the color was off.
Calumet sells a Viewing Filter Kit - which has most all the
correction filters - yellow/magenta/red/green/blue/cyan in
densities from .25 to 40 (the Kit costs about 50 dollars and
each individual filter costs $10 to 15 so the kit is cost
effective and handy). The goal is to get the filter pack to have
the proper mix of filter colors and densities.
I held the original and the copy next to each other up to the
same tungsen light (with a piece of white paper over the light to
diffuse it - I was told that a color balanced view box
(expensive) or this simple system work equally well for checking
color veriation - the key is to view the slides together in the
same light) and play with the Calumet Viewing Filter Kit by
putting the Kit's filters one by one in front of the copy slide
till the slide colors both matched. In my case the best filter
turned out to be #40 Green. So I shot a second role of film -
using the filters Kodak said on the box, at the same film
compensation but now only added the 40G green filter to the
pack......
The processed 2nd roll film was returned the next day AND the
copies were darn close. A little less green and a little more
cyan and - bingo. This copy film has low contrast so that the
copy wont increase in contrast. You will loose a little of the
edge with each copy you make - and focus carefully. Kodak wants
an exposure of 1 sec - my exposures are what the OM2n tells me at
f22 - focus and depth of field are an issue.....
While on this topic, I tried to buy 'interneg' film to copy
slides to negatives, they only come in bulk rolls of 100feet or
more....... Any suggestions? (Nahhh, I don't want to get a 250
camera back....???)
Cheers
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