7D Mark II - Focus Discussions

digital paradise, I think the chart you posted may say it all. It says that apertures of 2.8 or larger high precision AF is possible with the center. When I get home I will verify if I was at 2.8 which I normally am with the lens but it may be using the center which I normally do for high speed sports in AI servo is best.

diamonddawg21 wrote in post #17952110
digital paradise, I think the chart you posted may say it all. It says that apertures of 2.8 or larger high precision AF is possible with the center. When I get home I will verify if I was at 2.8 which I normally am with the lens but it may be using the center which I normally do for high speed sports in AI servo is best.

It is not that it won't focus. Centre will be better. Your lens falls into group A (starts on pg 100 of the manual) so all the points are available but not all are going to perform the best at 2.8. This is how I interpret it but Doc has come up with something. I have to admit I have never put a lot of effort into this.

all of the pictures were taken at 2.8. I will continue to use the center for my action stuff and the other AF points for static objects.

diamonddawg21 wrote in post #17952245
all of the pictures were taken at 2.8. I will continue to use the center for my action stuff and the other AF points for static objects.

Many of other sports Shooters definitely don't rely on Center point. It wouldn't give proper framing very often. No problems using other Af point that I have heard about. Can you share and example showing the AF point overlay on the player? I am suspecting low contrast of a solid uniform is the culprit but could be wrong.

These images I took through the fence

through the fence

Over the fence with absolutely nothing in between me and the subject.

Here is what I was getting when I changed to center AF. these are all screen shots, I was not sure how to show the AF point exporting from DPP.

Unless you had the lens up against the fence with the center of the lens going through the center of one of the links. If you had any distance at all between your lens and the fence, it would have diffused your IQ.

That being said, I often use all off-center AF points for sports, with no issues, using a 70-200 2.8.

TeamSpeed wrote in post #17952673
Unless you had the lens up against the fence with the center of the lens going through the center of one of the links. If you had any distance at all between your lens and the fence, it would have diffused your IQ.

That being said, I often use all off-center AF points for sports, with no issues, using a 70-200 2.8.

I shoot sports with that lens, too. When I shoot in landscape orientation, I have it set on center point (expanded to 9). In portrait orientation I have it set two points above center (also expanded, but that point is only expanded to 6 because it on the edge of the break between the zones of the focus points)

I have never had a problem focusing even through a fence.

Doc

diamonddawg21 wrote in post #17952626
Here is what I was getting when I changed to center AF. these are all screen shots, I was not sure how to show the AF point exporting from DPP.

Hosted photo: posted by diamonddawg21 in
./showthread.php?p=179​52626&i=i143510031
forum: Canon Digital Cameras

It would have been helpful if you had provided EXIF data with these images.

sorry about that, here are the two I was most concerned about because I was not shooting through the fence. I will give it a another go in a few weeks but I have never had my camera and lens combo act like that before but I dont recall using anything but center for sports since I got this body.

My first thought, not sure if it has anything to do with your results, is why you are at 1/8000 f2.8 at ISO 400? If you have maxed out your shutter speeds like that, I would have brought down the ISO 2stops. I am not sure if there is an issue at that shutter speed or not, but I would have more comfortable with 1/2000th or slower, which would have then required you to stop down to f4.

The other thing that might come to mind here is that your distance to the pitcher might have been enough to allow convection currents to interfere with your shot. However, that doesn't make sense if you moved to the center AF and this issue then went away.

Did you have IS turned on? Is there a chance you didn't allow it to settle down before shooting? At speeds of 1/2000 or more, my IS is turned off as it does nothing for me. 200mm isn't far enough away that IS helps for anything, even if to steady what I see in the viewfinder.

I have to step out for a long while but I shot a hockey game last night with my 7D2 and 70-200 II all in 2.8. I did move the AF point to the right for a few shots which I'll post. I also shot the practise shots through netting.

Here is a start.

https://photography-on-the.net …showthread.php?​p=17952900

https://photography-on-the.net …showthread.php?​p=17952910

First shot. AF point is on the goalie pad. I had no hunting.

https://photography-on-the.net …showthread.php?​p=17953177

teamspeed, I dont have an answer for you regarding the shutter speed I selected at that moment, I was in such a frenzy trying to sort out why it was hunting I did not take notice. The 70-200 2.8 I have is the non IS version, I purchased the non IS because when I did my research I was advised that since it would be used for sports the IS feature would not be required.