Looking to pick up a nice flash for my canon AE1 Program, any suggestions would be greatly appreciated
Does the Youngnuo support A mode?
Hi Chan,
No, the Yongnuo YN 560 IV is strictly manual exposure. It does not have automatic exposure control modes.
Most dedicated flash units have automatic exposure control. The Vivitar 283 was not a dedicated flash unit but it had automatic exposure control modes. These modes rely on changing the duration of the flash output to control the exposure. At the full power setting, the flash duration could be longer than 1/1,000th second. At the lowest power settings, the flash duration could be as short as 1/20,000th second.
I never relied on the Vivitar's automatic exposure modes because the portrait film I use has problems with reciprocity failure at the low power/short flash duration settings. Therefore, I primarily shoot only at full power and used the flash guideline number and/or a handheld flash meter to determine the correct exposure.
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