Bare filament lamps such as the one in your Maglite work well. For more
light consider bare automobile quartz halogen headlight replacement bulbs
(12 volt, 50 or 100 watt) and other 120 volt bare quartz halogen bulbs
(without multi-mirror reflectors). These bulbs are hot and can explode, so
putting them in a tin can with a hole for the light output and ventilating
holes at the bottom and top would be safer.
A 35mm slide projector is probably the easiest and safest.
Gordon
At 04:21 PM 7/7/02 -0400, J. Tallman wrote:
Hello All,
I am taking some documentary photographs of a new sundial concept and I
need a little help.
I recall reading several postings in the past that referred to using a
point light source to simulate the sun. This would be very helpful in
simulating conditions such as solstice and equinox declination, as well as
any desired time of day. Accomplishing these various conditions outdoors
is proving very difficult (and hot!), so I would like to set up an indoor
photo shoot with a common backdrop. This way I hope to create the ideal
times and declinations for my instruction sheets.
Does anyone have any suggestions for a good point light source to use? I
have tried several flashlights and lightbulbs and I keep getting fuzzy
shadows. The best "point of light" I have found so far is a mini MagLight
flashlight with the reflector assembly removed...but it is not as bright
as I would like. Any ideas?
Jim Tallman
<mailto:[EMAIL PROTECTED]>Artisan Industrials
Gordon Uber [EMAIL PROTECTED] San Diego, California USA
Webmaster: Clocks and Time: http://www.ubr.com/clocks
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