----- Original Message ----- From: "Jean-Marc Liotier" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, April 08, 2005 8:33 AM Subject: Re: EOS 350D v 10D
> On Thu, 2005-04-07 at 22:30 +0100, Malcolm Stewart wrote: > > [..] > > That's not what Canon (UK) told me whan I complained about the pathetic > > performance I suffered from the first E-TTL ! They patronised me saying > > that I didn't understand how it worked. (But I could see 2 stops of > > under-exposure.) > > What mode do you use it with ? From my experience, best results indoors > are achieved with M. Outdoors for fill flash I use Av or P and both work > as expected. Av or P indoors have almost always been underexposed and I > don't use them there anymore. > Also I was having flash exposure problems until I understood that > focus-recompose does not work as expected when using flash because > exposure is calculated at E-TTL preflash time, not at focus time. It's along time ago now, like 1995 --- just after I'd bought my 1st. EOS50E and the matching 380EX flash. E-TTL flash with 380EX on camera and using lenses with focal lengths above 50mm were exposed fine. But, if I used a lens wider than a 50mm, say a 28mm (even if I kept fairly close, so well within what the flash should do), the results were very heavily under-exposed. I investigated by purchasing a roll of neutral grey cloth and used this as a background with my "subject" surrounded by the cloth and completely filling the camera's field of view. I took a series of slides with different lenses, and a Canon EF zoom covering the range of focal lengths. I also used a flash* meter to confirm my results, and this too showed that there was a serious drop in flash power with lenses shorter than around 40-45mm. *Flash meter was triggered off the main flash (not the E-TTL pre-flash) by using delayed action for the tests. I had other serious problems with both of my two EOS50Es, and so moved on to an EOS3 and later a 10D with 550EX flash guns and the STE-2. Life has been better since dumping the 50Es. Malcolm Milton Keynes, UK http://www.megalith.freeserve.co.uk/oddimage.htm * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
