tonyxcom wrote in post #17579429
Funny you mention this. I was just telling a friend the other day how on my 1D4 my tracking sensitivity was at -1 and I had to set my 7D2 to +1 to match it.
I've only done any serious shooting with 1.04 so I can't comment on the before and after. As a little background to my statement above.....
I shoot karts and one of the shots I take is karts head on in a turn or right before turning. I generally just hold AF-ON and click off on the shutter when the karts are framed the way I want. The camera is nearly stationary. So it was during this scenario in which -1 on the 1D4 was sufficient for snapping the focus to the next kart; which could be 1-3 kart lengths behind the one leaving the frame.
I mistaking assumed that -1 on the 7D2 would be equal. Boy was I wrong. I watched out of focus karts enter and leave the frame. I didn't have much of a problem if I stopped and restarted focus but I'd rather avoid the finger cha-cha so I ended up at +1 on the 7D2 before it equaled the 1D4.
Try Case 3 - it may work for you - it starts at +1
I have done quite a bit of experimenting with the different cases recently and they really do react very differently from each other.
If you do a simple test, such as:
- putting on a long lens
- use expanded 4 or expanded 8
- focus on a target such as a bright flower with your expanded 4 or 8 using BBF (AF-ON)
- enable AF Function with the DoF button (switch to 65 AF points) - holding this button down
- you will now see the camera tracking the 'flower'
- now move the camera left right up down to see how the camera tracks the flower
- it was very interesting to me to see how differently the 6 Cases do during this exercise
The other thing I have concluded is that the 3 factors (Tracking, Accelerating, Switching) can start fighting each other very quickly if you increase any of the 3 by +1 within any of the cases - in fact, sometimes adding a +1 makes 'things' slower overall or basically ruins the case entirely as you can almost feel the computer getting confused.
I could be wrong, but doing the above test, I thought by increasing Switching it should make the 65 AF points change faster as I moved the camera around trying to see how the computer tracked the flower, but it didn't work as I hoped and revealed after some experimentation that increasing Tracking instead and not Switching resulted in a far better outcome.
Finally, once you do all this experimenting, you quickly conclude that if you are using AI Servo, you better know what you are doing because you have unleashed the computer and the Case you choose, your camera technique, the number of AF points available for tracking, etc, etc, etc, all dramatically effects what is going on. If you don't want this, or it isn't working for you, One-Shot and keeping AF connected to the Shutter Button is likely a better idea.
Hockey and wedding photographer. Favourite camera / lens combos: a 1DX II with a Tamron 45 1.8 VC, an A7Rii with a Canon 24-70F2.8L II, and a 5DSR with a Tamron 85 1.8 VC. Every lens I own I strongly recommend [Canon (35Lii, 100L Macro, 24-70F2.8ii, 70-200F2.8ii, 100-400Lii), Tamron (45 1.8, 85 1.8), Sigma 24-105]. If there are better lenses out there let me know because I haven't found them.