- Messages
- 5,869
- Name
- Richard
- Edit My Images
- No
See that doesn't make sense to me. You say you use high tracking sensitivity so you can recover more quickly when getting back on target after losing focus but the whole point of setting a lower tracking sensitivity, as Case 2 originally does as standard, is to stop this happening in the first place, so if the target strays from your selected AF points momentarily, the AF system won't immediately focus on the background.
Or is it to do with the length of time you lose tracking on the subject? I guess the low tracking sensitivity is intended to deal with momentary losses of tracking on the subject or interruptions such as something moving between the camera and subject. Even with low sensitivity, if tracking is lost for any length of time, I guess the camera would give up and refocus on the background, at which point you'd want high sensitivity to bring it back to the bird as soon as possible?
I'm guessing here of course as I'm not a bird photograher by any means. Whilst I've used Servo AF quite extensively, I've never shot anything as erratic as BIF
Hi
The reason it is best to use the higher tracking sensitivity is simple I raised this point many years ago with the original 7d . if the bird is flying towards you or on an angle across you if you used the slow option your point of focus would be behind the subject if you lost it in the view finder and at the speed some birds move it could be a few feet out before you find it again. By using the fast option it allows the camera to recover focus quicker now if the bird was flying parallel to you the slower option would work ok. The problem is you can't control which way the bird will fly so the higher tracking sensitivity wins out in the long term. There is a caveat to this though you need a really good panning and tracking technique to take full advantage of it I am one of the lucky ones when it comes to this as I seem to have been born with that bit of skill. If people struggle to track a bird sometimes you have to cheat what works for one doesn't always work for others I have a friend who is useless at tracking and he freely admits it. So we experimented when shooting against blue skies we upped his ISO allowing us to step the lens down to give us a greater depth of field then enabled all AF points his hit rate went up because even if he achieved focus on the wing the head was sharp. I would not recommend this approach for the majority of people but it allowed him to enjoy his trip to Gigren Farm.
The trouble is not everyone has the skills to take full advantage of all the custom settings for the autofocus and this is where sometimes the cameras get blamed.
Last edited: