Howard, you'll get the best results if you buy a flash meter. That way you
won't worry how to set ratios and stuff. You can use as many flashes as you
want, put them in optical slave mode and set them to manual. With flash
meter, you can also use studio flashes or whatever and get precisely what
you want.
As for 550EX, it can do everything, including only controlling other flashes
via wireless ETTL.
The flash meter is also the cheapest solution. IMHO, E-TTL and other high
tech stuff implemented in flashes are convenient if you do not have time and
want to get the best possible results in a changing environment (evaluating
light and flash exposure when you press the shutter release). Where the
environment is steady, the flash meter is the way to go, and is more hassle
free. :)
Just my $.02.
Best regards,
Miha.
-----Original Message-----
I have an Elan 7 and a 420EX flash. I am interested in possibly using
multiple flashes for macro and some portraiture (currently using off camera
shoe cord 2). In the best of all possible worlds I would want to be able to
vary flash intensities to the different flashes as well as having FEC.
Is my best bet an ST-E2 and another 420EX, ST-E2 and 550EX, or just add a
550EX and use it as a master (I asssume you can run it as a master while
using it to also fire a slave flash off camera..is that true)? Will the
ST-E2 allow two 420EX's to vary flash output on different channels? Since
the FEC for the 420EX is via the camera body would the slave 420 lose that
ability?
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