The Fluorescent Photos above were taken using
2 Regular Photoflood Bulbs for the White Light Shots. I used
an Ultra Violet Short Wave light for the colorful shots. The
short wave light was moved constantly during exposures
Calcite is the
predominantly RED color. Willemite
is the predominantly GREEN color.
Hydrozincite is the predominantly BLUE
color. There are some shots that contain a Greenish
color that is somewhat lighter than the Willemite. It is
Fluorite. The background used was either a
Maroon or Black Velvet cloth.
For the color shots, I used a
special filter from the late John Rex. He got it from his son
who works for one of the local TV stations. It is a gelatin
filter that the TV stations used over their studio lights to
color correct flesh tones. I also tried using a standard 80 B
photographic filter. The color was not real good but
acceptable.
The film used was 35mm.
Kodachrome slide film. ASA 50. Time exposures were used for
the color shots. They ranged from 45 seconds to 1 and ½
minutes at f.8. I experimented for around 6 months before I
obtained desirable transparencies. The 35mm. Slides were
scanned into the computer in the TIFF format and resulted in
files of 9 MB in size. These files are E-mail size, around
100 KB.
The camera used was a Pentax
ME Super. It had the a cable socket and a locking release was
used for the time exposures. White light exposures were
recorded as 1/4 to 1/8 Second at f.8
The W-behind the number
indicates White Light
The C – behind the number
indicates Color
Bob Derk
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Brucite from Cedar Hill Quarry on the
Pennsylvania-Maryland border. Left under normal light, right
under long-wave uv light. Collected and photographed by Kerry
Matt.
