Slide duplication
SO-366 and 5071

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Photography by Erwin Voogt

On this page you will find some information about slide duplication with the Kodak Ektachrome slide duplication films. You need to use these special low contrast duplication films to make good duplicates from E6 (Ektachrome) or Kodachrome slides.
Kodak has several slide duplication films. The most common ones are the SO-366 and the 5071. The SO-366 is a daylight film, the 5071 is balanced for tungsten (3200 K). On this page you will find results of both films.

The slide duplication films are not amateur films. The colour balance and sensitivity varies from batch to batch. A "starting point recommendation" for the colour balance and the ISO setting is printed on the carton box. Furthermore you have to compensate for the colour balance of the slide. In the paper enclosed with the duplication film an adjustment to the filter pack is given for Ektachrome and Kodachrome films.
I have experimented with serveral ISO settings and different colour compensation filters. General conclusion:

  • The ISO setting is not very critical, but you have to add one stop to the recommended setting (EI32 on the carton, then use ISO 12-20)
  • The "starting point recommendations" for the filter pack are adequate
Below you will see some examples and some experiments with the colour balance. I have used the following equipment:
Olympus OM2n, Zuiko 80 mm F4 1:1 macro, bellows and a slide-duplicator.
With the SO-366 I used the T32 flash at about 15 cm distance as a light source, with the 5071 I used a slide projector (3400 K) at 50 cm as a light source.
In both set-ups I put the colour compensation filters just in front of the light source.
Kodak Ektachrome 5071

Kodak Ektachrome SO-366

The 5071

Carton box information:
Compensation for Kodachrome:
Compensation for 3400 K vs. 3200K:

Used for the duplicates:

EI40, +05C+15Y
+10C
+10Y

ISO 20, +20C+30Y

Kodachrome 25 Copy on 5071
A "difficult" Kodachrome 25 slide of the 1999 Solar Eclipse. This slide has many subtile colour shades and it is a perfect example of Kodachrome's unique capability to capture "the magic light". Of course, this is hardly visible on this low resolution and highly compressed jpeg. The copy on the Ektachrome 5071.
The duplicate lacks the subtile colours and warmness of the Kodachrome, but it is probably not very different from an Ektrachome slide taken from the scene.

Right, a duplicate of a less difficult Kodachrome 25 slide.
This duplicate only lacks the high resolution of the Kodachrome 25, but the colours and contrast are almost identical. The white snow is a good test for the colour balance.
Duplicate 5071


The SO-366

Carton box information:
Compensation for Kodachrome:

Used for the duplicates:

EI32, +10M+80Y
+10C

see below (+10M+10C+80Y = +70Y)

SO-366
Copies of a kodachrome 64 slide.
ISO setting 12.
Y70
No filtering.
Y100
Y70 C30
Y70 M30

Copies of a kodachrome 25 slide.
ISO setting: 16.
Compensation filters: Y70 M10









Y70 C10











Y80











Y80 M5











SO-366
Copies of a kodachrome 64 slide.
ISO setting: 20.
Compensation filters: Y70









ISO setting: 12.
Flash under exposed.
Y70









ISO setting 12.
Y70










ISO setting 12.
Y70 C10










SO-366


Picture copyright owned by Erwin Voogt.
Please contact me first if you want to use any of these pictures for any purpose.