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#1 |
Junior Member
Join Date: Feb 2006
Posts: 18
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I am not clear on the difference between TTL auto operation and P-TTL auto flash operation on the new digital cameras.
What is the difference, and what are the limitations? |
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#2 |
Senior Member
Join Date: Aug 2002
Posts: 851
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On film cameras TTL (Through The Lens) metering was a way for the camera/flash to measure the actual exposure and respond accordingly.
With digital there have been variants of that (D-TTL, I-TTL - both Nikon) that have refined the basic TTL idea and do essentially the same thing, but in a more refined way. Canon, I believe, also have a TTL variant. I have not heard of P-TTL specifically, but I suspect it is a manufacturer's specific implementation of TTL for use with their cameras. |
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