5D mk II aperture priority mode - DPChallenge Forums

Canon EF 85mm f/1.2L II USM

04/11/2011 11:22:33 PM · #1

Hi,

Its been just over 3 months with my 5DmkII, an I've been always using the manual mode to control my shutter and aperture. But yesterday when I was shooting a candid shoot with a honey moon couple on the beach I was using the Av mode and noticed the camera was compensating itself with a -1/3 or -2/3 stops on every shot even when my compensation in the dial was set to 0. Is this normal? After reading few forums I understood this happened to few people with a non-canon lens. But as I was using all canon lenses I'm not sure why this happened. Is there any one out there who had this issue and had overcome it?

thanks

Message edited by author 2011-04-11 23:27:20.

AllenP

Canon EOS-1D X Mark II

04/11/2011 11:34:26 PM · #2

Originally posted by neesham:

Is your Auto bracketing on by any chance? (Menu->2nd tab->Expo. comp./AEB.) Just maybe ...

Samsung Galaxy S24, S24+, S24 Ultra

04/11/2011 11:40:15 PM · #3

Nope, just checked it.

Bear_Music

Sony 24-70mm F4 Vario-Tessar T* FE OSS

04/11/2011 11:51:34 PM · #4

Are you seeing the "compensation" in the EXIF on the shot, or are they just darker than normal?

R.

04/12/2011 01:08:39 AM · #5

Originally posted by neesham:

Where you by chance using flash fill? My Canon 7D does the same thing when I use my 580EX II triggered by the 7D in E-TTL mode. I doubt it would do that if I used manual flash, and it doesn't do that without the flash. When used without flash the EV stays where I set it.

Dave

Voigtlander Ultron 35mm f/1.7 Aspherical MF Wide Angle - Black

04/12/2011 01:11:59 AM · #6

Originally posted by Bear_Music:

Are you seeing the "compensation" in the EXIF on the shot, or are they just darker than normal?

R.

I'm pretty sure he'll say it's in the EXIF data. I was with mine and I noticed it right away. See my post below as well Robert. I'm not a flash expert, but it appears to me that when shooting in E-TTL in Av mode if the camera and flash communicate and feel in order to balance the ambient light with the fill flash...the Ev setting is by no means off limit.

Dave

Paul

Leica SL

04/12/2011 01:41:53 AM · #7

Highlight tone priority enabled?

04/12/2011 01:52:27 AM · #8

Its visible on the exif data as well as in the meter reading through the view finder, shots are darker than normal. And I wasn't using flash fill but a white reflector. I was so confused when I knew this was happening it wasn't a problem on my 40D.

Voigtlander Ultron 35mm f/1.7 Aspherical MF Wide Angle - Black

04/12/2011 01:53:45 AM · #9

and yeah highlight tone priority is enabled.

Paul

Leica SL

04/12/2011 01:59:20 AM · #10

Originally posted by neesham:

and yeah highlight tone priority is enabled.

That may be it I think - try disabling it.

Message edited by author 2011-04-12 02:01:07.

04/12/2011 02:16:04 AM · #11

Originally posted by paulbtlw:

Originally posted by neesham:
and yeah highlight tone priority is enabled.

That may be it I think - try disabling it.

Ahhh, Paul I think you might have nailed it. Come to think of it...I never use highlight priority mode, but I DID have it enabled on my Canon 7D since I just got it a few weeks ago and was testing it under all conditions and putting it through the paces. I remember I enabled it for testing, but didn't disable it until later on. You might have pegged that issue.

I would also check the setting on the Auto Light Optimizing as well. I didn't use that much if ever on my XSi, but feel the 7D handles that much better...as it should. Hugely in part because of the better noise reduction. On my XSi it sometimes brought out unwanted levels of noise in the shadows.

So if it's not the highlight tone priority I would also disable the Auto Lighting optimizer setting to see if that effects it.

Nice call Paul. I'd be surprised if that didn't resolve the mystery.

Dave

Voigtlander Ultron 35mm f/1.7 Aspherical MF Wide Angle - Black

04/12/2011 03:06:32 AM · #12

yep disabling it corrected the exposure reading. :D

been wonderful here with DPC crowd, many thanks to everyone. after all there is something new we learn everyday.

Paul

Leica SL

04/12/2011 04:32:52 AM · #13

It's a setting I've learnt to hate having spent a day capturing a rare snow fall only to return with dull, underexposed images!