question about XTi af

How do I use the flash to assist AF in low light but not fire for the actual picture? I tried using the AE* lock but have so far been unsucessful.
Thanks in advance.
Ted

I don't think you can do it, at least with the built-in flash.

I guess in a creative mode, you can pop up the flash, let it burst to lock AF, the turn the flash down and shoot.

gooble wrote in post #3541711
I don't think you can do it, at least with the built-in flash.

oooh, I was under the impression one could. If not possible any tips on how to maxamize the ability to AF in low light.

That feature isn't available on the Digital Rebel series. You need to move up to the 20D/30D or better to get that.

Doug Pardee wrote in post #3542022
That feature isn't available on the Digital Rebel series. You need to move up to the 20D/30D or better to get that.

The flash on my XT will rapidly flash to illuminate something if there is too little light. Also, once you get better than the XXD series, there are no pop-up flashes...

Hi guys, newbie alert

Does the quality of lense effect focusing ability in lower light conditions? Or is it not so much the lense and purely the sensor and therefore would increasing ISO help?

On my Sony H2 a reasonably powerful red AF assist light is emitted from a sensor which seems to be a good little feature and a simple one to include you would have thought, considering the 350/400D are aimed at the pro-sumer no?

Aside from that I would have said manualy pushing the flash back down after it has AF assisted would do the trick?

R Ebert wrote in post #3542822
Hi guys, newbie alert

Does the quality of lense effect focusing ability in lower light conditions? Or is it not so much the lense and purely the sensor and therefore would increasing ISO help?

On my Sony H2 a reasonably powerful red AF assist light is emitted from a sensor which seems to be a good little feature and a simple one to include you would have thought, considering the 350/400D are aimed at the pro-sumer no?

Aside from that I would have said manualy pushing the flash back down after it has AF assisted would do the trick?

Faster lenses will give brighter viewfinders and make it easier for autofocus to acquire a lock in low light. Increasing ISO would have no effect at all as the sensor has nothing to do with focus, there is a dedicated sensor for that job.

Tel wrote in post #3544325
Faster lenses will give brighter viewfinders and make it easier for autofocus to acquire a lock in low light. Increasing ISO would have no effect at all as the sensor has nothing to do with focus, there is a dedicated sensor for that job.

Ah ha, thanks fella.

Also going back to the initial question someone else asked, the only situation I could see myself wanting to get AF-assist and then not use flash is if I had a tripod surely?