canon users! flash speedlight 580 ex !! problems

05/01/2006 11:31:59 PM · #1

did any one had sincronization problems ?? using a strobe light?? flash head whit the speelight 580 ex??

05/01/2006 11:33:15 PM · #2

Are you using your strobe as a slave?

05/01/2006 11:35:03 PM · #3

Originally posted by mk:

Are you using your strobe as a slave?

the speedlight as a slave.....

05/01/2006 11:36:28 PM · #4

I don't believe it works that way. My understanding is that Speedlites are only triggered by Speedlites.

05/01/2006 11:37:52 PM · #5

Originally posted by mk:

I don't believe it works that way. My understanding is that Speedlites are only triggered by Speedlites.

wow that is a issue to thing about.... maybe I must think it more before i buy that speedlight

05/01/2006 11:44:54 PM · #6

but what happend if i use my bowens as a slave??

05/01/2006 11:48:02 PM · #7

I'm guessing that would work because the Speedlite would set it off. Maybe someone else can confirm...I've only ever set my strobes off with another strobe.

05/01/2006 11:49:41 PM · #8

Originally posted by mk:

I'm guessing that would work because the Speedlite would set it off. Maybe someone else can confirm...I've only ever set my strobes off with another strobe.

that can work... any one?? can confirm that??

SamDoe1

Canon EOS-350D Rebel XT

Canon EF 24-70mm f/2.8L USM

05/01/2006 11:50:43 PM · #9

Yes, it will work. The strobe has a sensor on it that will set it off by any flash.

dwterry

Canon EOS-1D Mark III

05/01/2006 11:52:10 PM · #10

The speedlites are 'smart' flashes. They aren't simply triggered by another flash, the master actually communicates with them and tells them how much power to put out.

For example, with a 580EX on camera, and two 430EX's as a slave, you can set an A:B-C ratio. Let's say the 580EX is on the camera acting as a fill light, one of the 430EXs is acting as the key light (off to the left or right of the subject), and the second 430EX is used as a background light (or perhaps a hair light).

You set the 580EX as a master and put it in Group A, you set the first 430EX as a slave in Group B and the second 430EX as a slave in Group C.

Now, back on the 580EX, you adjust the ratio of A:B to, let's say, 1:4. That will give your key light more power than your fill light so that you'll get a nice shadow along the subject, providing a 3-D perspective.

When you push the shutter on your camera, the 580EX will send out a signal (via flash) to all of the units, telling them to flash. It will measure the amount of light from all units, and send out ANOTHER signal telling them to fire. The shutter will then open and all units will then fire. All of this happens in the blink of an eye.

Oh yes... they are much more than just slaves. :-)

dwterry

Canon EOS-1D Mark III

Canon EF 24-70mm f/2.8L USM

05/01/2006 11:54:22 PM · #11

Originally posted by SamDoe1:

Yes, it will work. The strobe has a sensor on it that will set it off by any flash.

This is absolutely INCORRECT. A regular strobe will NOT fire the speedlite.

(and just to be sure I'm not off my rocker, I just now tried it myself)

05/01/2006 11:55:35 PM · #12

Originally posted by dwterry:

Originally posted by SamDoe1:
Yes, it will work. The strobe has a sensor on it that will set it off by any flash.

This is absolutely INCORRECT. A regular strobe will NOT fire the speedlite.

(and just to be sure I'm not off my rocker, I just now tried it myself)

I believe he meant that the Speedlite will set off the strobe as I'd already stated that the opposite was not true.

Canon EF 24-70mm f/2.8L USM

05/01/2006 11:58:16 PM · #13

yeah! thanks dudes that was helpfull
i think that my plan that use the speedlight as a slave for my strobe colapsed olympicaly

dwterry

Canon EOS-1D Mark III

05/02/2006 12:02:40 AM · #14

Originally posted by mk:

I believe he meant that the Speedlite will set off the strobe as I'd already stated that the opposite was not true.

Oops, I was reading too fast. Yes, the speedlite will set off a strobe, just not the other way around. I apologize for the confusion.

hankk