Cotty, Good addition. I think this is how anybody doing Matrix Metered TTL flash must operate. What is amazing is the time scales here. 1/10,000's of a second look like minutes to the electronics. So they light the scene, take a meter reading, evaluate it, and then set the appropriate power output. All in the twinkle of an eye.
Does the new Pentax do matrix TTL metering? Regards, Bob S. [EMAIL PROTECTED] writes: > Another brand of camera who shall remain nameless puts 2 flashes > together, one after the other in rapid succession. > > Here's what happens: the shutter button is pressed, the mirror swings up, > flash one fires, a TTL reading is taken of the scene and the flash is > quenched, the image is analysed and the exposure assessed depending on > whether spot/center-weighted/matrix mode is chosen, any necessary > adjustment is made to flash duration, shutter blades open, second flash > fires and exposure is made onto chip/film, shutter closes, end of > sequence. > > This happens so fast, I did not realise it was happening until I read it. > The 2 flashes are almost impossible to seperate, and the exposures are > usually flawless. Bounce flash, white ceiling at 7'6" height, camera > about 4 feet off the floor, flash directed at ceiling slightly in front > of camera, cam to subject distance about 8 to ten feet or so. And my oh > my, a square crop! > > http://www.macads.co.uk/snaps/portraits/images/pic18.html
