If we are talking issues this happened to me this weekend while shooting high school football... I set up my back AF-ON button in the custom config to be AF-OFF instead. So I "half press" shutter button to acquire focus, lock focus with back button while maintaining half press. I noticed that if I shoot a sequence of frames and pause but still maintain half press, then try to press again there is no response from the 7DII - no pictures taken. This resulted in missed shots! I had to physically lift up the shutter button completely in order to take more shots(with the back button completely pressed the whole time). Now I was also using a 300mm L IS at the time and tried using the dedicated defaulted AF-OFF buttons on the lens (instead of back button on the camera) to do the same situation described, and it worked as expected... So has anyone else experienced this issue? I would think this has to be a bug and hopefully fixed in the next firmware update? Or is there something I am doing wrong or a hidden setting to allow what I want. I know the first generation 7d did not have this problem... I used this technique quite often.
I will check this tonight and see if I can reproduce that. I wonder if it's specific to the big whites or does the same thing with other lenses?
I believe this was happening to me on the 7DII along with a 70-200 L is II as well. However there is not a dedicated AF-OFF button on the lens hence why I configure the back button for this purpose. Also I usually configure both the back "AF-ON" button and the "*" to be AF-OFF so as a "miss aligned push" will yield what I want It didn't matter what button here I configured for this technique, the outcome of "no response from 7DII" still occurred.
Also I did send this issue to Canon right before posting here, via the Canon website
Just wanted to describe my findings on this issue that I am having, if anyone else is running into this, or following... After 5 emails back and forth from Canon, asking to reset everything and take battery out for 5 minutes and try again... they came to the conclusion that this is how it is designed on the 7dII. Frustrated since this works on the original 7D, I went back to the 7DII and tried again paying close attention as to what I was doing. It turns out I was wrong about my comment that it works with the "dedicated AF-OFF button" on the 300mm L is lens. It is the same as with the 70-200 L is II. Here is what I found: If you push any "AF-OFF button" configured(either on the lens body or a custom configured back button) BEFORE pushing the shutter button, multiple volleys of frames taken, with a pause in-between, from the "half pressed state" to "shutter release" works. Now if you press the shutter button first to "half press" and then push any "AF-OFF button" configured, the first initial volleys of frames taken will work, but the second and subsequent presses from the "half pressed state" to shutter release will produce no pictures taken - unresponsive 7DII. One might think that I am anal about this ... But it was very frustrating when you are out in the field trying to figure out why the camera won't take pictures, granted in this weird set up state So in the process of figuring out this issue I noticed a new button custom config that I can use on custom back button that solves my issue even better than the original 7D... it is the "*AF-OFF" customization. This locks metering and AF! So the continual "half press" is not needed anymore.... But if I am am shooting a football game and I am using both the 7dII and 7D, I am going to get confused while trying to use this technique... But the price you pay for an awesome camera
I've found that sometimes you dont get the resolution you want or expect over the phone or by email. I had a similar experience a while back but rest assured the report is in and it will work its way up to development where the firmware guys will taks a look at it. IT could get fixed if its fixable...just have to deal with it for a bit.