HOME-MADE SLIDE COPIER
BY John Slater)

Here gleand from Area Three’s local news is an interesting item from member of that Area, John Salter on his ‘Home-made’ Slide Copying apparatus. I have been doing slide duplication for years, Here are a few comments which may be of use:-

Although I have produced hundreds of dupes, I have never been able to make an exact copy. Good though many have been, there, have always been. differences from the original,

 

2, My copier is home made and can be used with, a flashgun or tungsten bulb. I can copy from part of a slide. here is a diagram of the device made in plywood and chipboard.

 

Key.  
A - SLR camera screwed on to extension tube C which goes through.
B - a stand, sliding in a baseboard slot and secured by a wing nut.
C - extension tube.
D - 50mm lens attached to other end of extension tube.
E - frame to hold colour printing filters.
F - piece of opal glass.
G - lamp house, removable for replacement by flashgun.
H- 150W enlarger lamp.
I - mains plug.
J -  pear switch.
K - baseboard.
L - slide carrier with four way movement. 

3. For copying part of a slide I use extra extension tubes.
4. With tungsten bulb a starting point for exposure would be Fit at 10 seconds on Etachrome 5071 coping film, processed in E6 chemicals, with a filter pack of, 60. 20M and UV. (Kodak values).
5. With a flash gun, GN2O (100ASA in metres) in place of the bulb. I process as follows:-
A. put ‘on thickness of white handkerchief over the .flashtube.
B. put an R3 filter on lens.
C. flash’ the film in the camera by removing the slide and putting, a ND filter which at F11 cuts down the value, in front of the gun.
D. using Kodachrome 25 give an exposure at F11 with the slide to be copied in the slide holder.
6. Like all copying, both the methods produce an in contrast.  On a flat original this is an advantage. On a normal or contrasty original it is a disadvantage.
7. When I have several reversal films to process, I include with the first of these a test strip of a dupe, which is required. After processing and examination I then modify the filtration if necessary and c1ose an exposure, then process the copy so made with the next normal film”.

Processing Problems

Editorial

CRCMain