artsupreme wrote: dj63401 wrote:
I also posted this in it's own post.
Two clips showing how the tracking did for me recently. I was shooting video of Bald Eagles, and the first clip starts with the Eagle about 360 feet away. I followed it as it flew out to the Lock and Dam 21 on the Mississippi River. It was about 1800 feet at that point. It only lost focus lock for a second or so that I can detect near the Lock and Dam, even with many other eagles flying close by. Second clip is a different Bald Eagle coming into a tree with its catch, and it followed it from open sky up to the tree with lots of branched in between us. It did a very good job following, but not perfect in my opinion.
Gear and settings were Canon R5 MKII, RF200-800 at 800mm. 1/250 sec at f11, auto ISO. 4k 4.2.2 120 fps slow motion. Autofocus settings were Movie Servo AF, AF Area: Whole Area AF, Subject to detect: Animals, Eye Detection: Off, Movie Servo AF speed +2: Movie Servo AF track sensitivity -2.
Processed in DaVinci Resolve with very light stabilization, and minor sharpening only on 1st clip. Second clip has some added exposure on Eagle along with Stabilization and sharpening.
Review: I shot with the R5 before shooting with the R5 MKII.
The R5 MKII seems to detect the subject much faster, is stickier and does not lose focus anywhere near as often. A big improvement on an already very good camera.
Dave
&ab_channel=DaveJohnson
Amazing Dave. Quick question since I don't have my camera on me - it seems you've played with AF servo speeds and you have yours at +2. Is this the same AF speed setting that would relate to Rudy's rack focusing test above? In other words, if you did the same test as Rudy your rack focus would be very quick and glitchy compared to Rudy's which I'm guessing is a negative setting. I don't recall is there's more than one AF speed setting for servo in Movie mode.
Brett,
Sorry I've been kind of MIA lately and absent from the forum discussions, I had some family things to take care of but I'm finally back in the saddle again.
Regarding your question about the Movie Servo AF Speed function of the R5ii: I did some Googling on Youtube and found a video that shows and talks about this function on the R5ii and it appears to be exactly the same as in the R5 with 7 minus settings for slower speeds and 2 plus settings for faster speeds. He explains that the resultant speeds are also affected by which lens you're using and by the shooting situations. This is what I have discovered when experimenting with rack focusing on my R5 with my RF50 f1.8. If you go to the time 51:16-35 in this video you'll see it:
What I did to get the smooth, slow rack focusing in the video I posted on the previous page was I experimented with the Movie Servo AF Speed settings while using my RF 50 f1.8, I shot in 4K120 in order to slow things down and also to reduce camera shake because I wanted to be able to do this technique hand-held in the field without needing a tripod. I just played around with the speed settings until I got a pleasing result. In various tests like the one in my office where I placed a Canon lens cap on my knee I found that the speed was also affected by the length of travel and by how close the closet object was to the camera. In this case the lens cap was very close to the camera so the final focus in the rack travel was quite slow, but thankfully it was very smooth. By the way, in this clip there was originally quit a bit of focus breathing which I mitigated manually in Davinci Resolve. It's pretty easy to do.
So we probably need to do a little experimentation for every rack focus shot we do in order to find the best settings for our video format, lens and distance between the objects, but thankfully we don't do very many rack focuses in any given video so it's not a hardship.
Rudy
Feb 13, 2025 at 06:08 PM
Previous versions of Rudy Pohl's message #16752831 « Canon video thread for hybrid shooters... »
