>> [ ... ] >> >> > > With the exception of the *istD, DS(in TTL mode) and Fuji S2 Pro, all > digital flash systems are entirely pre-flash based and do not use light > reflected off the sensor to determine flash exposure. Traditional > TTL-OTF flash is more accurate than preflash-based flash, but the > latter is much easier to achieve with digital, and allows for the > wireless flash capabilities that have so many enthralled. > Something I've been wondering about lately, is which is better of a traditional auto-mode and P-TTL. I mean, which is greater of the error in the pre-flash based prediction and the inaccuracy resulting from using a sensor not measuring through the actual lens (and making calculations based on a "theoretical" aperture)? Any thoughts?
Maybe the best result might be achieved if you used an external sensor to control the actual flash operation, but included a through-the-lens pre-flash measurement to collect knowledge about the actual exposure conditions? Is anyone doing that? - Toralf -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
