<< Someone who has used the 50/3.5 can tell you how close you can get
before you need to move the flash from the shoe. >>
You can shoot a T-32 (tilted down), on an OM body with a 50mm macro
focused to 1:2, and be able to leave the flash in the shoe. The Bounce
Grip 2 gives better modeling, though.
The change in focal length with floating elements has a minor bearing on
figuring manual flash exposures from mathematical calculations. When I
first tested at varying magnifications and apertures, I found the best
exposure to typically be a variation from the formula. Here is my
T-32/50mm macro chart again:
ISO 50 film with the Diffuser (from the T-32 Filter Pack = 2x neutral
density)
Flash in Bounce Grip 2
1:10 mag High power f/16~22
1:8 Low power f/12.5
1:7 Low f/14.5
1:5 Low f/16
1:4 Low f/20
1:3 Low f/18
1:2.5 Low f/20
1:2 Low f/16
If you use ISO 100 film and the darkest neutral density filter, you can
reduce these apertures by one stop, thus allowing use of the 50mm f/2
Macro with a minimum aperture of only f/16. Of course, if you are
shooting in full sunlight you are going to risk overexposure with this
combination since the flash sync speed is only 1/60th. Makes a good
argument for a OM-2000 when you are doing manual flash work in macro
photography.
My battered T-32 has this chart pasted to it and it has been used for
thousands of technically successful flower shots. Whether any one
becomes artistically successful depends on the rest of your technique.
Gary Reese
Las Vegas, NV
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