05-08-2021 07:52 PM - edited 05-08-2021 07:54 PM
I have been trying to photograph hummingbirds. R5, EF100-400mm L ƒ5.6 w/adapter ring. Usual settings around ƒ5.6, ISO 400, 1/2000; remote RF trigger. Each time I adjust the settings, I resave it to "C1" custom settings (having learned that if the camera goes to sleep you lose any adjustments you made.)
As they are fast, darting creatures, the AF setitngs on the R5 have been useless. I have now resorted to manually focusing on a spot where they seem to hover over the feeder before plunging in.
However, when the R5 goes to sleep, and then wakes up when I click the remote, the focus is gone! It is so completely off you can only tell if a bird is there by some extra-color in the completely burred-beyond-recognition scene. Worthless. So, AF is worthless in this scenario. Now MF seems to be worthless as well. Any idea/thoughts/ suggestions?
There is nothing in the manual about this. There's barely much explanation (even in the "advanced" manual on manual focus.) There was only this zen-like line in the manual regarding "manual focus" and "power off": "The camera’s auto power off counter does not count time spent adjusting the focus with a lens’s electronic focusing ring." !!! If anyone can do a Vulcan mind meld with the author and understand what s/he means by this, that would be fantastic. My IQ isn't high enough to figure that one out.
My guess is that in fact, you are not actually focusing the lens anymore, such as with earlier EF lenses or the older film-era FD lenses, but are just changing the focus setting of the camera electronics. That would explain why it loses the focus every time it wakes up, and also suggests that these settings can't be saved (which seems ridiculous.) If it were really a mechanical setting, it would not be able to change the setting by itself...
Anybody else have this or similar issues? Thoughts? Solutions welcome!!! Thanks!
Solved! Go to Solution.
05-08-2021 09:11 PM
"My guess is that in fact, you are not actually focusing the lens anymore, such as with earlier EF lenses or the older film-era FD lenses, but are just changing the focus setting of the camera electronics."
The above statement is inconsistent with your previous statement that you are using an EF mount lens.
The camera does not save any focus information in the C1 custom shooting modes. I suggest you set your camera for BBF.
05-08-2021 11:11 PM
My apologies for the entry oversight and lack of additional detail....
I meant to write EF-camera lenses or the older film-era FD-camera lenses, meaning when mounted on those EF cameras or FD cameras. In my attempt to be brieft, I left out some additional information such as:
1) This is a phenomenon with the R5 (at least, assume for the other "R" cameras, as I only have this one) as this is certainly not a problem with my 5D-MKIII or any other DSLR I've owned. You manually focus. You shut the camera off. You turn it back on. Voîla! It is still focused on exactly where you last focused it.
2) However, take the same lens, the same tripod, put the R5 on it, and do the same thing and when you turn it back on, the there is nothing but a frame completely blurred to oblivion.
3) Take the R5, mount an RF 70-200mm L ƒ4, same problem: completely blurred to oblivion. (Can't test it with the 5D and I don't have a reverse adapter.)
Hope I have completed the picture.
Your comment, "the camera doesn't save any focus information" is a statement suggesting that it is, indeed, an electronic focus on the R5 camera, not a mechanical one, as with the same lens on a 5D MKIII, and as such, somehow disengages ithe manual focus ring using it instead to drive digital information to the camera. How else would it not be focused then when you turn it back on? The fact that it is "all electric" yet you can't then save the focus info - hugely important - seems ridiculous then. And Canon says nothing about this anywhere.
And for bird photography - for any other small moving object photography -for time-lapse photography, just to name a couple, this is a huge problem.
BTW, what is "BFF"? (I know you are not referring to relationships between between two high school girls...
05-09-2021 12:07 AM
On my R5, in the Menu, C.Fn4, there is an option to “Retract lens on power off.”
I disabled the feature and then focused on the object furthest away. Power off.
i move the lens barrel to point at an object close to me. Power on. At this point, i heard a clunk as the lens motors moved to focus at a new distance.
disclaimers: i’m inside, you were outside. I used an RF 70-200. I’m using shutter priority.
Hth (hope this helps)
05-09-2021 01:48 AM
"I have been trying to photograph hummingbirds. R5, EF100-400mm L ƒ5.6 w/adapter ring. Usual settings around ƒ5.6, ISO 400, 1/2000; remote RF trigger. Each time I adjust the settings, I resave it to "C1" custom settings (having learned that if the camera goes to sleep you lose any adjustments you made.)"
Hmm. You appear to clearly state that you are using an EF mount lens with and mount adapter.
Do you have a copy of the full R5 User Guide? If not, it can be downloaded from Canon USA Support.
BTW the term I used was BBF not BFF. It is an acronym for Back Button Focus. Here is a link to in-depth video tutorial on how to use the R5, and what the various menu settings do.
05-09-2021 06:32 AM
Post your question over on the Fred Miranda site. A lot of R5 users over there.
05-09-2021 01:50 PM
05-09-2021 02:41 PM - edited 05-09-2021 02:44 PM
THANKS! Good suggestion. I will try to find it.
Good luck. You're correct. I have no idea what you have been describing. I think that it should be impossible for a lens to refocus when the AF/MF switch is set to MF. But, you're saying that it refocuses.
Good Luck, resolving your issue..
05-09-2021 08:32 PM - edited 05-09-2021 08:37 PM
"Good luck. You're correct. I have no idea what you have been describing. I think that it should be impossible for a lens to refocus when the AF/MF switch is set to MF. But, you're saying that it refocuses."
What I gathered is, as his main complaint, he can't get the R5 to auto focus on a hummingbird when using a remote trigger and his conclusion is that the AF in the R5 isn't working properly. Then, to remedy that, he is trying to pre-focus on a spot manually (lens in manual mode) where he thinks the bird might be at some point. So at some time, after pre-focusing the lens, the R5 goes to sleep or powers off while he is waiting. Then when his target appears he wakes tha R5, takes the shot with his RT, and manual focus has been re-set, i.e., his target area is no longer in focus and all he gets is a blurry shot.
Now, my DSLR's do retain manual focus on an object when switched off then back on, like if you are on a tripod, manually focus on a subject, then turn your DSLR off. When you turn it back on, that subject will still be in focus, just like you left it. With our R6, if you do that, focus is re-set to minimum focus distance and not where you left it. I know this because of this post and it's not something I would do or have ever needed to do, just to be clear.
I made a long winded reply to this threead late last night, with images, and decided to delete it because it didn't really answer the OP's concernes. I've been remote shooting hummingbirds for quite a while, but have never used a remote trigger. Instead, I use either a 15' plain USB cable or 30' USB cable with a repeater, and either the EOS Utility or Helicon Remote, depending on which laptop I'm using. My wife uses WIFi or Bluetooth with the R6, I'm not sure which. I prefer USB because it is more resposive, at least with the 5D mark IV and 7D mark II. With the utilities, you can focus with a mouse click, or if you have a touch screen, a finger while in live view. But you know that
Shot using 30' USB cable w/repeater and EOS Utilty.