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DPChallenge Forums >> Hardware and Software >> Flash Photography and the 300D
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06/15/2004 11:21:54 AM · #1
Hey everyone!

Just curious about flash photography with my 300D. I know the 550EX & the Sigma 500 Super offer E-TTL compatibility. But what about straight TTL flashes? Has anyone tried these? What sort of results did you get? What features did you miss by not having a flash offering E-TTL?

Thanks for the info!
06/15/2004 12:26:30 PM · #2
If price is a concern, why not the 420EX speedlite? With the $15 rebate it is the same price as the Sigma 500. I picked up the 420EX for my PowerShot Pro1 and the results are amazing.

Good explanation of E-TTL, A-TTL and TTL

Some good reading about E-TTL
06/15/2004 12:39:39 PM · #3
Thanks for the info AW.

I've considered the 420 but it seems to be lacking in the manual feature set.
06/15/2004 12:42:56 PM · #4
Biggest issue with using the 420EX on the rebel would seem to be the lack of flash exposure control on the rebel.

If you use a 550EX you can at least dial it down on the flash unit. If you use a 420EX on a 10D/D60 you can dial it down on camera, but from what I hear the rebel doesn't let you do that.

I almost always use my 420EX with TTL, but dialed back to -1 & 2/3rds FEC to try to give more even/less noticeable fill flash.
06/15/2004 01:01:49 PM · #5
Originally posted by Gordon:

I almost always use my 420EX with TTL, but dialed back to -1 & 2/3rds FEC to try to give more even/less noticeable fill flash.


So you disable the E-TTL feature?
06/15/2004 01:35:40 PM · #6
Originally posted by digistoune:

Originally posted by Gordon:

I almost always use my 420EX with TTL, but dialed back to -1 & 2/3rds FEC to try to give more even/less noticeable fill flash.


So you disable the E-TTL feature?


I disable auto fill reduction and just dial it down. Seems to work quite well, though I'm by no means experienced with fill flash.

Message edited by author 2004-06-15 13:38:38.
06/15/2004 09:47:05 PM · #7
Originally posted by Gordon:



...

I almost always use my 420EX with TTL, but dialed back to -1 & 2/3rds FEC to try to give more even/less noticeable fill flash.


Gordon by Dialing back (and FEC) do you mean the Flash exposure compensation?

I've been running Flash Exposure Compensation with my 420 at -2/3s on the Pro1.

Sorry, I'm a noob to these new fangled flash units, in the old days a bright light went off and everyone closed their eyes when you took the picture. Now I hear whirling in the head of this thing as it zooms in and out, lights Dancing across the back of it, and the camera changing settings all on it's own. I need to read about the FE Lock feature on this thing. Actually I use mine for fill as well, bouncing it almost 99.7% of the time.

I may want to drop to -1 2/3's as well as this thing is still a little warm indoors.

06/15/2004 10:15:49 PM · #8
Originally posted by Gordon:

I've been running Flash Exposure Compensation with my 420 at -2/3s on the Pro1.

Sorry, I'm a noob to these new fangled flash units, in the old days a bright light went off and everyone closed their eyes when you took the picture. Now I hear whirling in the head of this thing as it zooms in and out, lights Dancing across the back of it, and the camera changing settings all on it's own. I need to read about the FE Lock feature on this thing. Actually I use mine for fill as well, bouncing it almost 99.7% of the time.

I may want to drop to -1 2/3's as well as this thing is still a little warm indoors.


Tell me about it! In another thread, the fact that some older flash units could fry your camera was discussed. I'm sure glad I learned about that!
But what about with a 'hacked' Rebel - you should be able to have more control of the flash that way, yes?
06/15/2004 10:40:15 PM · #9
Originally posted by awpollard:

Originally posted by Gordon:



...

I almost always use my 420EX with TTL, but dialed back to -1 & 2/3rds FEC to try to give more even/less noticeable fill flash.


Gordon by Dialing back (and FEC) do you mean the Flash exposure compensation?


Yup - that's what I mean - slightly more control than with the 'auto fill reduction' enabled, and using flash to just raise shadow values slightly, rather than provide the main light source, I've found that the
-1.66 EV value gives generally good results (based on something by Galen Rowell that I read). Though the whole (E-)TTL operation is a bit on the mysterious and quite complex side to me just now.
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