RF-S Lenses on Full Frame EOS R Bodies

[Bbarn]

Has anyone used one of the new RF-S lenses on an EOS R series full frame body?  I'm wondering how the IS and Focus/Control ring functions are controlled with no switches on the lenses. Doesn't seem clear in the full frame body manual since it's a new scenario (since all the FF lenses have lens switches).

[Bbarn]

Go back and read the thread from the beginning, keeping in mind the timeframe (when ALL FF RF lenses had a switch for the control/MF ring and for stabilization [if the lens was equipped with stabilization]).  Instead of answering my simple question, I was told by most it was a bad idea to use an RF-S lens on a FF body.  I already knew the downside of doing such, and my question was unrelated to that. 

[flyingron]

I read it  just fine, but my statement was as true in 2022 as it is today.   The short primes (which existed long before your post) lacked the AF/MF and IS switches.   The only way to control these is from the body side.   

[Bbarn]

Nevermind.  Seems people just refuse to acknowledge that when my question was first asked (upon introduction of the first RF-S lenses), the RF-S lenses had no switch for the control/focus ring nor an IS switch.  At that time all RF FF lenses had a switches for the control ring function (as needed) as well as an IS switch for IS equipped lenses.  So the question was how to control those functions when using RF-S lenses on FF bodies.  Instead of answering my question, most replies were trying to discourage the practice (even though I knew the drawbacks).  I eventually received an answer from Canon directly (who was touting how the RF-S lenses could also be used on FF cameras).  At the time, nobody here knew that new menu options (to make up for the lack of switches) were enabled on the FF bodies when an RF-S lens was attached.  The answer to the original question is easily found today, but the answer was elusive over three years ago on this community board.

[flyingron]

You have quite an attitude.  I answered you question.   I also pointed out that you're wrong.  THere are RF (not RF-S) lenses as well that lack IS and AF-MF switches.     The answer is (though you apprently can't read or don't want ot hear the answer) is that you have to switch it off in the body menus.

[ebiggs1]

He did answer your query. Quote...............

"But to answer your question, the same control ring and focus issues work the same way the the RF lenses do.  If the lens doesn't have a switch, then you use the camera menus.   Even some of the physically smaller RF lenses do not have an AF-RF and IS on/off switch."

Was there something else you didn't understand about it. I am just curious.

"Instead of answering my question, most replies were trying to discourage the practice ..."

These folks and myself were/are just trying to recommend or suggest a better way to proceed. Nothing else. Every question has side elements and answers that pertain to the question. Some you will like and some perhaps you don't.  Everyone here is simply trying to help by offering their expertise and experience totally free of charge. Now whether you adopt it or refuse it, that's on you.

[Bbarn]

In the OP, I asked how to set the control ring function and IS function on RF-S lenses when used on a FF body (since the then-new RF-S lenses had no switches). Never received a correct answer on this site. Instead I immediately received (mostly) replies saying (paraphrasing) I was stupid to use an RF-S lens on a FF body.

At the time (and perhaps even today), all FF RF lenses equipped with IS had a switch on the lens to turn IS on or off. Not so with the then-new RF-S lenses. So, how to control the lens IS without a switch? Turns out Canon incorporated a menu item (only when an RF-S lens was attached) to turn IS on or off.

Likewise, all RF lenses at the time had a switch to select the control ring function (Focus or Control, or later, AF/Control/MF). Without a switch on the new RF-S lenses, how was one to select the control ring function on an FF body? The short answer is you can't. Turns out the control ring on RF-S lenses can be used only for manual focus when used on a FF body.

Some of the above may have changed slightly in the years since the OP questions were written.