On the topic of flash macro lighting, there was an article in Photo
Techniques in Jul/Aug issue. "Dual Flash Macro Lighting Ttechniques
with the lepp bracket". An interesting thing I did not know is the
following:
<...>
You have to persist. Learning how to use my Lepp bracket was worth
the effort. After all, my only other options were harsh singleflash
shawdows or flat ringlight illumination with its weird catchlights.
You also will have to learn about the link between light size and
subject size. A closeup flash guideline is that you want the light
and subject to be the same size, and you want to use the light from a
distance equal to the subject size. Simple geometry dictates that a
reflector twice the subject size should be at least twice as far
away. This relationship shows form and texture. If your flash turns
shiny surfaces such as the exoskeletons of insects into hazy glare,
then the flash is too big and too close. Using a telephoto lens will
move the gun back, effectively making it smaller. Automatic TTL flash
guns often have large reflectors that work best with telephoto
lenses.
Not sure I understand completely, but some interesting points.
Wayne
Hopkinton, MA
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