09-03-2018 11:47 PM
Nice RC shot! Thanks for sending. Point of clarification, please: I assume you mean you use 65-point automatic selection in the full AUTO configuration (you do not use the single AF point implanted in the viewfinder with the other two non-AUTO options -- AF tab 4, item 6, choices one and two), which means the camera both chooses and tracks what it identifies as the subject. That's why you move to an Expansion AF Point mode when concerned about conflicting/confusing backgrounds, right? You may find this of some interest: I shot some Canada geese yesterday when they were first in the open sky, but then they flew across a background of fir trees, and wove in and out of a group of trees that were between me and them -- the tracking never wobbled, always kept them in focus irrespective of the changed background or intervening foreground (I have Tracking Sensitivity set at -2, which is "lock on and forget what else comes into the VF"). I was shooting with 4-point Expansion AF and AI Servo. Thought you might find that of interest. I can see the advantage of having all 65 AF points available for tracking, but am concerned about most of my subjects not being the sole or closest object to be automatically identified as the subject, then tracked -- that's just the kind of stuff I normally encounter when I go out. I can see the advantage of 65-point auto in your RC shot. Thanks again.
09-03-2018 11:53 PM
09-04-2018 08:35 AM
All points active works well for me since my targets can change direction quickly & are usually up against the empty sky. Some are also very fast so just keeping them in the viewfinder can be a challenge. See my reply here.
09-04-2018 09:30 AM
"...a new 300 L lens will be of some benefit to those of us with a lot of gray hair"
Don't forget those of us with little to no hair of any color! The ef 300mm f4L is one of a very few lenses I consider a good candidate for using a tel-con. It handles it well.
09-04-2018 09:57 AM
" It can go into sort of a feedback loop where the IS is actually causing image shake."
I don't know if this is happens or is even possible. All I can say it has never happened to me.
09-04-2018 10:02 AM - edited 09-04-2018 10:05 AM
I have a great number of Canon lenses. I don't have every lens' manual here in front of me. But the couple I do have at my computer desk say, "When you use a tripod, the Image Stabilizer should be turned off to save battery power." That is all I can see.
If they sensed a tripod, there would be no need to manually turn IS off.