Zeiss JENA PLAN HD 9x12, Operation Instructions Manual

Page: 54 / 76

B-0705-1 01/1992 (Digitized 07/2005) 2 - 21
necessary with respect to the exposure time, which are obtained using larger illuminance
might expect. Conversely, it follows that with a constant exposure time and longer sub-
exposures occur. Since different recording materials (especially color films) under-
show schiedliches Schwarzschild behavior, the manufacturer must be observed.
Color films are in terms of color fidelity optimized for certain exposure times:
- Daylight films mainly on 1/50 s,
- Tungsten films mostly at 1/5 s,
- L-films (long) for exposure times up to 60 s
Occurring color shifts can be compensated by the use of Korrektionsfiltern.
Selection criteria are the desired representation of the object color and image contrast.
Page 55
Increase the image contrast
In black / white photography, color filters are used to enhance image contrast. For
the selection of the filter applies:
The contrast of object details in relation to the ground is raised,
if the color of the filter is complementary to that of the object details.
The contrast of object details compared to the background is reduced,
if the color of the filter matches the color of the object details.
When using panchromatic films (recording material for all colors
is sensitive) are also reproduced all the color tonal values.
When using orthochromatic films (recording material, the orange or not
sensitive to red is), it is convenient to work with the green filter V233/32. The identification of the
Shots with the coding of the DATEX mf-AKS is not possible with this material.
Adjusting the light source to the color recording material
Color films have a high sensitivity to the used light source (color temperature-
temperature). According to their heritage, they are used as artificial light or daylight film con-
offered.
Spectral characteristics of the light sources JENA PLAN:
Lamp 12 V / 00 W 1 = artificial light source with a color temperature of 3200 K, increased
Red. -
Light Xe = daylight source with color temperature of 5500 K, increased amount of blue.
For adjusting the color temperature of the light source used on the receiving material
be
conversion filter
used (marking on the filter edge etched):
- C311/32, C312/32, C313/32 to reduce the Rot-/Gelbanteils.
- C314/32, C315/32, C316/32 to reduce the blue-Niolettanteils.
NOTE:
When working with daylight film (color temperature 5500 K), in conjunction with the
12 V/100 W halogen lamp (color temperature 3200 K), the conversion filter
C311/32 recommended. Note that the color temperature of this lamp
the operating voltage dependent. During a series of recordings, therefore, the
Lamp voltage is not changed.
Recommendation: Maximum for color shots lamp voltage.