DSLRs are rougher on aperture mechanisms, because they open the aperture between the shots, at least in AIServo. The R-series cameras, at least the R5 and R7, stay stopped down throughout AIServo bursts with all the lenses that I've looked into the front of.
The only problems that adapters can cause is resistive; poor contact of conductors, but such would evidence itself in error codes, I would think, and probably wouldn't cause a whole lot of spurious aperture or focus motor movement.
Breaking News: ANYONE WHO WAS ALIVE DURING WORLD WAR ONE IS AT AN ELEVATED RISK OF DYING THIS YEAR.
No, because Nikon Z cameras exclusively use OSPDAF for focus. Of course, the constant churn of the AF* might also do them in earlier, but at least they don't rack focus constantly.
Definitely, but I have no evidence from those users, there just aren't many around. And probably even less of them use EF lenses regularly. But it stands to reason why Sigma don't recommend their own older EF/SA lenses for use with the MC-21, as their older AF motors are especially vulnerable to this.
Ha, ha............good one
It seems one of the problems with owning an R body is it can make people more gullible?
Canon has designed the adapters to be hard on EF lenses in order to force people who've upgraded their cameras to upgrade their lenses also and sooner than they'd like.
In my limited experience with the R5, I'd say it's very likely. On a typical DSLR, the lens focuses only when you press the focus button, whichever one you've mapped. The default situation with the R5 has it focusing all the time. The lens does way more work on a mirrorless camera than it did with a DSLR.
So? ... and what do they have to say?
5D mk I era too.
I don’t think they have it. At least not without some incredibly in-depth analysis, trying to tie AF motor failures to extended adapted use, and that’s already a pretty flaky connection to make; not every user will declare whether they intend to use their lens on a mirrorless camera, or even on both a DSLR and mirrorless. Even someone who rents, say, either an R5 or A7RIV and an EF lens is guaranteed to use it exclusively on their rented body. What if they want to upgrade from a 5DIV or 5DS, and they run the lens for relatively equal time on each body?
This is an interesting question.
Rubbish.
Not unless they track whether a rented EF lens is used adapted on a R body or not. I don't see any indication that they know that
Repeat it a few times on a few forums etc and people would start to latch onto this juicy bit of information. I bet there would also be a comment drop from an unnamed Canon rep at some pointCanon has designed the adapters to be hard on EF lenses in order to force people who've upgraded their cameras to upgrade their lenses also and sooner than they'd like.
Actually i don't believe a word of that, but as you have come up with something that has potential as an urban myth I think we should go all the way and turn it into a conspiracy theory because we really don't have enough of those.
Perhaps worth asking that tech his basis for the claim - get a sense of what common means
