Can someone explain why?

I now have the 430 ii, and am trying wireless activation.

I have tried, alone, with the on-board(60D) and ratio with the on-board.

I have noticed even with trying to open my eyes wide i get no Red-Eye. Yet with the on-board alone i get Red-Eye.

So the question is, how come i get no Red-Eye with wireless even using the on-board, yet with no external speedlite i would get Red-Eye?

Maybe the optically-coded pulse being sent from the pop-up to the 430EX is enough to shrink your pupils as a red-eye reduction pre-flash.

I thought that, but i am using BOTH the 430 and on-board, surely there should be Red-Eye. Or am i missing somthing, i am not complaining i just want to be sure, so when i do shoot like this i don't get Red-Eye surprise.

from Wikipedia

" It occurs when using a photographic flash very close to the camera lens "

SMP_Homer wrote in post #14959079
from Wikipedia

" It occurs when using a photographic flash very close to the camera lens "

You miss read, i am NOT getting Red-Eye, the question is,

When using BOTH the speedlite(wireless) and on-board flash, how come there is NO Red-Eye?

Because red eye is from your eye reflecting the flash back to the camera. When the flash is off axis (your 430 EX), it reflects a different direction instead of straight back to the camera like it does with the onboard. When the onboard is flashing to activate the 430EX, its not a flash used to produce exposure, its a weaker flash used to send info to the 430 EX, so the red eye doesn't show up.

Dannybegood wrote in post #14959138
You miss read, i am NOT getting Red-Eye, the question is,

When using BOTH the speedlite(wireless) and on-board flash, how come there is NO Red-Eye?

As mentioned above, the on-board flash is sending a series of light bursts to the remote Speedlite and that is causing the iris in the eye to close down enough to prevent red-eye. It's essentially the same principle as activating the anti-red-eye feature for a built-in flash.

Do you have the pop-up set to just fire the 430? Using wireless with the pop-up as master it looks like both flashes are firing at the same time but they are not. The pop-up fires before the photo is taken unless you have deliberately set both to fire. Just because you have a ratio set doesn't mean you have both flashes set to fire when the photo is taken. Hope this helps as in 'been there done that'.

DanThoman wrote in post #14959252
Do you have the pop-up set to just fire the 430? Using wireless with the pop-up as master it looks like both flashes are firing at the same time but they are not. The pop-up fires before the photo is taken unless you have deliberately set both to fire. Just because you have a ratio set doesn't mean you have both flashes set to fire when the photo is taken. Hope this helps as in 'been there done that'.

I have tried all 3 variants, still not a hint of red-eye. Are you saying the On-board does not contribute? as the manual says it does. Just curious as alone the pop up produces red eye, yet in all my tests with all settings there is non.

Dannybegood wrote in post #14959589
I have tried all 3 variants, still not a hint of red-eye. Are you saying the On-board does not contribute? as the manual says it does. Just curious as alone the pop up produces red eye, yet in all my tests with all settings there is non.

Chances are that when you're using the pop-up flash with the Speedlite, the pop-up isn't using the same light level for the exposure as it would be all alone. That could make a significant difference in reflection from the retina (red-eye).

Unless you have the camera set up to have both the popup flash and the 430 contribute light to the photo the popup flash will only fire a pre-flash which allows the camera to control the 430. The pre-flash from the popup does not contribute any light to the photo.

The poor guy have said a number of times that he does indeed use the on-board not only to control the slave, but also to contribute to the flash illumination.

But as SkipD stated, since you are using a ratio between built-in and the slave, the built-in no longer provides all the light, but a part of it, so the red-eye effect would be weaker. Add to that the effect of the control flash pulses immediately before exposure, pulses which make the eyes contract, and you have less red-eye intensity in a smaller pupil.