Sigma 15-30 cancels auto-bracketing

[excessnoise]

I was picked yesterday to take pictures of our annual luncheon at work (I was the one with a pro looking camera, so I must be good the logic goes). Anyways I haven't shot much at all with my 10D so I thought it a good chance to see what it does. It was a very sunny, high contrast day so I decided to use the auto-bracketing. I had a large group of people to shoot so I used my Sigma 15-30 to get everyone in. I set the autobracketing to 1 stop each way but as soon as you turn off the menu, it gets cancelled. I found this odd. Put my 28-135 IS on and it works like a charm. Just thought I'd share this. I haven't seen anyone talk about it before.

[Cal Maier]

Hi Excess,

I don't use auto-bracketing but I thought I'd check your problem out, as I have a 15-30.

It worked like a charm. Just out of curiosity, did you remember to press the SET Button after you adjusted the setting in the menu? If you didn't, then the change would not take effect and the camera would revert to default when you went back to the shooting mode.

If you did press the set button, then I would take the camera and/or the lens in to have them checked at your local pro shop.

Cal
CPS432

[CyberDyneSystems]

I don't have the 15-30mm (its about the only zoom range I have in a Canon..) but all my other lenses are Sigma,. 28-300mm, 70-200mm, 50-500mm

I have never had a problem with autobracketing on any of them.

[excessnoise]

cal maier wrote:
Hi Excess,

I don't use auto-bracketing but I thought I'd check your problem out, as I have a 15-30.

It worked like a charm. Just out of curiosity, did you remember to press the SET Button after you adjusted the setting in the menu? If you didn't, then the change would not take effect and the camera would revert to default when you went back to the shooting mode.

If you did press the set button, then I would take the camera and/or the lens in to have them checked at your local pro shop.

Cal
CPS432

Yes I pressed set. I tried numerous times. It worked fine on my canon 28-135, just not on my Sigma. Note: I should clarify, it did take a series of 3 pics each time I set it but all were at the exact same settings. I was in AV mode and all had same aperture/shutter settings.

[DWard]

C-Fn-16 is a safety shift in Av or Tv mode.

It apparently will adjust the setting in an over exposure mode to get back within the exposure indicated by the metering.

It may be that this was affecting the shots with the Sigma lens. It would also affect the 28-135 shots if they were at the same settings. Also, remember that the 15mm lens will have a different metered exposure because of the wider angle of view.

I have both lenses and have never noticed the problem you mention. If it is an older Sigma lens it may require the "rechipping" Sigma offers to ensure compatability with the 10D.

One Man's View
David

[excessnoise]

dward wrote:
C-Fn-16 is a safety shift in Av or Tv mode.

It apparently will adjust the setting in an over exposure mode to get back within the exposure indicated by the metering.

It may be that this was affecting the shots with the Sigma lens. It would also affect the 28-135 shots if they were at the same settings. Also, remember that the 15mm lens will have a different metered exposure because of the wider angle of view.

I have both lenses and have never noticed the problem you mention. If it is an older Sigma lens it may require the "rechipping" Sigma offers to ensure compatability with the 10D.

One Man's View
David

Dave you might have hit on something. I just changed that setting the other day to activate (safety shift). I'll have to check that out. But my Canon lens works fine. It is a new Sigma lens, maybe 2 months old.

[excessnoise]

excessnoise wrote:
dward wrote:
C-Fn-16 is a safety shift in Av or Tv mode.

It apparently will adjust the setting in an over exposure mode to get back within the exposure indicated by the metering.

It may be that this was affecting the shots with the Sigma lens. It would also affect the 28-135 shots if they were at the same settings. Also, remember that the 15mm lens will have a different metered exposure because of the wider angle of view.

I have both lenses and have never noticed the problem you mention. If it is an older Sigma lens it may require the "rechipping" Sigma offers to ensure compatability with the 10D.

One Man's View
David

Dave you might have hit on something. I just changed that setting the other day to activate (safety shift). I'll have to check that out. But my Canon lens works fine. It is a new Sigma lens, maybe 2 months old.


Safety setting had no effect. Sigma wrote back and said they have never heard of the problem so they want to see the lens.