Using a ST-E2 on a Rebel XT, for focus assist only.

[amol]

Hey,

 

I got a Canon ST-E2 recently. I am using a Rebel XT and a 430EX. Using the 430EX

in slave mode everything appears to work as planned.

 

I have read several places that the Canon ST-E2 can be used to assist in

focusing. My understanding was (Correct me if I am wrong), that I could use the

ST-E2 without the 430EX, it would help with focusing in low light situations.

 

How do I do this? I checked my manuals, nothing there. I attach the St-e2 to my

XT, and it does help me focus. But it sets an exposure for a flash picture. The

viewfinder shows a flash icon. So far, it underexposes the picture, because

there is no "flash" to fire. Is there a Custom Function or switch that will

allow it to focus, and set exposure for natural light. Is this feature only

available on certain camera bodies?

 

Thanks,

Amol

[PuppyDigs]

The prosumer bodies--Elan 7E, 10D, 20D, 30D, 40D--have a CF to disable flash/enabled AF

assist for ST-E2 or Speedlites. Thus no ambient light exposure reduction. I don't own a Rebel

series but I assume you checked and no CF.

[colinsouthern]

NEVAC aside, I would have thought that it would only change the exposure/metering if you were in one of the creative modes - in the likes of Av / Tv / M modes it shouldn't have any effect on exposure/metering.

 

(Be sure to enable HSS)

 

Cheers,

 

Colin

[digitmstr]

Right, the flash and ambient exposures are separate in the creative modes so, it shouldn't matter (unless, like Puppy mentioned the Cf function is causing the under xp).

[PuppyDigs]

Actually NEVAC is exactly the problem with using AF assist from a Speedlite or ST-E2 without

flash disabled. Of course you can dial in extra EC to make up for it.

[bluphoto]

Perhaps this is a dumb question and I'm going to kcik myself when I find out, but can someone please tell me what NEVAC is?

 

thanks

Guy

[amol]

I think, it is meant to be NEVEC.

 

 

http://www.eosdoc.com/manuals/flash/NEVEC/