any advice on my canon 400D would be great thanks.

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xsjado-man

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i was at an event last night and had to use my flash built in to the camera, but every time i went to take a photo the flash would flicker. ( like its trying to find a focus point or somethingthing) i had it on the P setting. but it would blind everyone befor i actuly got my shot. is there anything i can do. so it just flashes with out the flickering at the start of it?

( if people dont know what im talking about ill try explain better if you like.)
 
It's red-eye reduction - you turn it off in the menus
 
Hi. I'm guessing it's in its AF assist mode. You've probably been using it in low light? (My 40D does the same thing.) Think you can disable it in the menu - don't ask me where, can't remember! ;)
 
thanks people, wouldent know what id do with out this forum lol.
 
yup its AF Assist - If you have a fast focusing lens AI servo disable it.
 
Is he not talking about the pre-flash the camera carries out just prior to making the exposure in order to calculate how much flash to give the subject?

If there is a gap between the flicker and the main flash then the flash is probably set to 2nd curtain sync. Try changing it to 1st curtain sync and the pre-flash and the main flash occur almost simultaneously, certainly close enough not to cause any distractions or confusion with the subjects.
 
I have found that if you manual focus it doesnt do the pre flash, hope this helps.

Phil
 
its not pre flash or 2nd curtain. The effect he is talking about only happens when the lens is hunting! Its a burst of really fast flashes.
 
33L said:
its not pre flash or 2nd curtain. The effect he is talking about only happens when the lens is hunting! Its a burst of really fast flashes and it's well annoying!!!! :(
Click to expand...

Edited for accuracy. ;):D
 
Hmm, so it's obviously AF Assist and not Red-eye Reduction as I thought. So, how does Red-eye Reduction work then? :thinking: :thinking:
 
Red-eye reduction works pretty much like that. (I'm not sure it's on any SLRs though is it?).

Basically it fires a flash or a few to 'blind' the subject so their iris contracts by the time the shot is taken. This means a smaller pupil, showing less of the retina and therefore fewer blood vessels to reflect the light back at the camera. Far from ideal, and more of a patch than a solution to the problem.
 
Jayst84 said:
parish said:
Hmm, so it's obviously AF Assist and not Red-eye Reduction as I thought. So, how does Red-eye Reduction work then? :thinking: :thinking:
Click to expand...

Red-eye reduction works pretty much like that. (I'm not sure it's on any SLRs though is it?).
Click to expand...

Yes, the 400D does have Red-eye Reduction

Jayst84 said:
Basically it fires a flash or a few to 'blind' the subject so their iris contracts by the time the shot is taken. This means a smaller pupil, showing less of the retina and therefore fewer blood vessels to reflect the light back at the camera. Far from ideal, and more of a patch than a solution to the problem.
Click to expand...

That's what I thought - so why is everyone saying it's AF Assist? :thinking:
 
its not 1 or 2 flashes - what is been said is that flash will continuosly flash until a focus has been locked.
 
Ah-ha, found the instruction book! The red-eye reduction light on the 400D is a separate light (LED?) on the body to the right of the lens. Maybe it was my A70 that used the flash for red-eye reduction? :shrug:
 
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