Urgent bounce flash question 760D owners

walkaround wrote:

Do you see a single example photo in this thread, or any other on this topic? Neither do I. Do you see detailed steps to reproduce? Why assume that your shooting conditions are representative of all use cases? I don't see this "problem" either, but I'm bouncing in a normal sized white room, without modifiers, in Manual exposure mode, with a subject only a few feet away (usually).

Your refusal to look at or accept the numerous sample photos people have posted (including me) does not constitute their non-existence.

Here is a brand new test, shot just for you.   Same scene.  Same flash.  Same settings.  Once on the 6D, once on the 70D.

Flash is in average metering on every shot.   FEC is off.  Exposure settings are identical from shot to shot (when comparing the same lens obviously).  Daylight white balance for all, no NR, no ALO, no vignette/CA/distortion correction has been performed.  Both cameras are using the same custom picture style I use for 99% of my photography (it's one I made myself based off the 400H sim from VSCO, because I don't like how red skin is with Canon's profiles)  - if you want to say it's the picture style, I'd be happy to upload the CR2's as well.  All the photos were processed in camera.

Both cameras appear to exhibit some degree of extra underexposure when using a variable vs fixed aperture lens.  The 70D is -far worse- than the 6D however in this scenario.  Neither camera has an issue when using a fixed aperture lens, and both take decently exposed photos (slightly dark for my taste, but to be fair the scene for that example contains a good amount of white).

So first up we have 6D, 40mm 2.8

70D , both with 40mm and standing back a bit, and with the 24mm 2.8 in the same location

Now, we go to the 70-300 DO, which pardon me for using such a long lens indoors, but it's the only variable aperture FF lens I have.   Most of the people complaining about their 70D's are using the kit lens (18-55 or 18-135) and I can reproduce the same problem with those as well, as demonstrated in the photos I've posted before.  But I wanted a common lens for these tests.

This one is a bit dark on the 6d.   But, this framing contains a lot of white.  Let's use a gray card filling the majority of the frame and see what happens

This is a teensy bit dark - the gray card is being placed slightly under zone 5 rather than square in the middle of it.  But whatever, it's 1/3 stop or less which is good enough for government work.

Let's see how the 70D handles these two scenes

There is not a word for this other than "unacceptable", but again, lots of white.  What does it do with our grey card?

Oh.