Urgent bounce flash question 760D owners

tr573 wrote:

walkaround wrote:

tr573 wrote:

"to meter the subject" - important part there. It knows how much flash it sent out, and how much it got back. Isn't that the whole point of autoflash? "get back less than expected, increase power. get back more than expected, decrease power"

If I stand the same distance away, it's a completely different scene, which potentially would have a greater metering impact than 4 feet of distance (unless you are at the edge of your flash range), don't you think?

I'm suggesting the same distance and framing, so 187mm on the 70D, 300mm on the 6D.

I will happily do this when I have some more time.

It sure isn't a problem on the 6D, regardless of whether it's a problem on other bodies besides the 70D.

I don't think one photo proves it isn't a problem on the 6D. It certainly is a problem on the 5D and 1D series, as I linked several times.

People complaining about their photos being a bit too dark, sounds like what I am showing on my 6D slightly underexposing. Not the unusable results the 70D is producing.

Mmm, no, people were complaining that they were 1 to 2 stops underexposed, and your 70D shot is exactly in that range.

Here are a few more relevant historical posts, just for fun. Deja vu?

"It's funny that when one uses FEL it generally gives a good exposure. I would have thought that the preflash in E-TTL II would have given similary consistent results. When shooting candid moments in rapid succession it is often not possible to spend time doing FEL and also makng FEC compensations etc." [Dec 26, 2006]

"I have noticed that when taking indoor shots with my 5D Mark II and a 580EX II flash that the pictures seem to always come out underexposed. I am using the P mode on the camera. If I set the FEC to +2/3 or +1 the exposure seems to be correct. Is this normal? It seems that the camera should be able to better meter the light in order to produce a shot with correct exposure without having to compensate for it. I am fine with making adjustments to get the correct exposure, but just wanted to make sure that something wasn't wacky with my camera/flash." [Feb 01, 2009]

"Anyway, the key words in E-TTL are in the initials: through the lens. The camera looks through the lens at the pre-flash and, in the case of a Canon camera, decides to underexpose by 2/3 to 1 stops." [same link as above]