E-ttl

[kennykodak]

this is an example of E-TTL. i had a Metz 58 AF-1C on camera and a remote Canon 580EX II mounted on the camera's left. the flashes where set to IR master/slave. flash on camera is in 45 degree bounce mode with a Stofen diffuser attached. remote flash was mounted on a 8' rolling light stand aimed straight up using a Fong Lightsphere II. the object was to create modeling in the dress but not loose and details. note, dress was retro 40's and not pure white. as always in these type of shots, camera was tripod mounted.

[Ian]

Re: E-ttl

this is an example of E-TTL. i had a Metz 58 AF-1C on camera and a remote Canon 580EX II mounted on the camera's left. the flashes where set to IR master/slave. flash on camera is in 45 degree bounce mode with a Stofen diffuser attached. remote flash was mounted on a 8' rolling light stand aimed straight up using a Fong Lightsphere II. the object was to create modeling in the dress but not loose and details. note, dress was retro 40's and not pure white. as always in these type of shots, camera was tripod mounted.

Justo add to this and to introduce some more basic understanding, E-TTL is Canon's through the lens flash metering system. All DSLR platforms have an equivalent. Basically, when the shutter is tripped, the camera measures the exposure via a pre-flash (the camera's mirror remains down and the shutter is closed). The camera's metering system then computes the best flash power output for the scene and sends the power setting the flash. The mirror goes up, the shutter opens and the flash fires at the power setting set by the camera's metering system.

These days usually the same metering system and sensor array used for normal metering is used for flash metering, so you can use evaluative (covering most of the screen) centre-weighted, and spot metering for your flash.

Ian

[kennykodak]

Re: E-ttl

Ian,
thanks for the background info that i should have inserted. E-TTL is indeed Canon whereas I-TTL is Nikon. as you can tell from my hasty post, i use Canon. whether one uses one brand as opposed to the other makes little difference. using this type of flash technique would have been similar on either. i will be blogging about using multiple light sources on a later date.