E-TTL2 is Canon's current label for their automated, integrated flash
system.
i-TTL is Nikon's current label for their automated, integrated flash
system.
P-TTL is Pentax current label for their automated, integrated flash
system.
All three combine flash exposure control along with ambient light
exposure metering, using various features of body and lens. Sometimes
they work marvelously, makes taking photos with flash as easy as
taking a photo on an ideal sunny afternoon.
At other times, all of them screw up. :-)
Godfrey
On Nov 8, 2005, at 10:48 AM, Shel Belinkoff wrote:
What do all those acronyms mean?
E-TTL2 and i-TTL seem to be massive improvements over earlier
systems.
P-TTL seems to be mostly that way, but it also seems to have
issues with
the onboard flashes.
