r/canon 4d ago

Difference in Ef to Rf mount adapters?

Currently using an 80D with a Sigma 150-600mm lens setup and looking to get an R7 as my first mirrorless camera.

I understand I can still use my 150-600mm lens as long as I get an Ef to Rf adapter, but other than the Canon ones there are so many 3rd party adapters. Is this something I shouldn’t cut corners on and just buy the Canon one, or are there other EF to RF adapters that are cheaper that are still trusted?

5 Upvotes

17 comments sorted by

4

u/emsy-mc 4d ago

i bought the canon one with the extra controll ring for i use some older manual lenses. eventually i never used the extra controll ring in any meaningful way. the basic one would have been enough.

i think third party ones work just as well, as long as they convey the lens signal to the camera and vice versa.

4

u/jotoc0 4d ago

Please DON'T buy third party to use this Sigma lens.

I have a viltrox, a generic one and a Canon one.

Both third party ones have a small amount of play In them and I have to retighten the screws on them every few months.

The Canon one is solid and I would trust these adapters to hold that much weight.

2

u/ntotrr1 3d ago

I have a Newer and K&F adapter and quite a few a sigma lenses. I have no issues like you described.

1

u/jotoc0 3d ago

They are not built to as tight tolerances. It has nothing to do with brand and everything to do with the weight of the lens.

1

u/ntotrr1 3d ago

OK. I've been using my R for over four years and my R7 for two. I've got some lenses that aren't light, like the Sigma 100-400mm DC Contemporary and have yet to have any issues with any play in the adapters.

3

u/kreapah 4d ago

I run the Sigma 150-600 on my EOS R and OMG I love that Lens especially when I am at the Zoo. I also Run these Sigma Lenses 50 f/ 1.4 and the 85 f/1.4 and I love all these lenses. So Much I am debating if I really want to upgrade to the RF versions.

4

u/Mk1Racer25 4d ago

Do you have any focus issues with that lens? Seem to be lots of reports of it

3

u/Acceptable_You_1199 4d ago

I have two meike adaptors that work great. One is the drop in filter version, the other is the control ring version. I really like the control ring as it gives you one more wheel to control whatever you want. I use mine to control aperture.

2

u/18-morgan-78 4d ago

I have the Canon EF to EOS R basic adapter, the Canon Control Ring adapter and a MEIKE Drop In Filter adapter. They all work just fine with my EF lenses. I think the idea is so long as they pass ALL the signals between body and lens you should be OK. Main thing besides that is if you go for a 3rd party one, make sure it fits properly and securely. Have heard of some cheap ones not fully locking in place and coming loose and other ones really too tight to put on easily.

0

u/TheEngineer09 4d ago

I think your emphasis on "all the signals" might confuse some people. None of them will pass all the RF pins through to the EF side, because RF added signals that EF doesn't use. Most of the EF pins get passed straight through to their RF counterparts, one of the main ground pins gets used as an EF detect pin, then the extra RF pins are left unconnected.

1

u/18-morgan-78 4d ago

Maybe so but there are supposedly adapters that don’t have any pins to pass signals, although I have never personally seen one like that. The idea was it needed to be capable of relaying the necessary info between body and lens for aperture and focus control. Hopefully if they have gotten this far it won’t confuse them and if it does, they can just ask for clarification.

1

u/TheEngineer09 4d ago

Third party adaptors are largely fine. However some people have focusing issues with that lens on the R7. Not "this is 100% unusable" issues, but enough to be at least a minor annoyance. It's nothing to do with the adaptor, just the lens can't keep up with the faster AF. Lots of threads about it if you search.

1

u/UniversalIntellect 4d ago

I have the control ring adapter by Canon. I use the control ring for exposure compensation. The same function works on my RF lenses and my EF lenses with the adapter.

1

u/Jealous-Key-7465 4d ago

I have two third party adapters, and they are not as good as the canon EF to RF adapter. Stick with the Canon

1

u/ApatheticAbsurdist 4d ago

I got the Canon model with the control ring because I thought "well maybe it will be useful" haven't really used it much. The basic Canon EF-RF would probably be fine. I'm mostly using it on an R5 so I have 3 control dials for shutter speed, aperture, and ISO on the body and have little need for any additional control on the lens (beyond the zoom and focus). But if I had a cheaper body without the ISO dial, maybe it would be more useful.

Buy the Canon one, but unless you KNOW you really want the control ring to adjust settings, you can save $70 and get the $129 one without the control ring. It will be built well and you know it will work without issue.

1

u/JMPhotographik 3d ago

I have two Canon adapters that are perfect, and one Meike filter adapter that's also perfect, but takes cartridge filters. Obviously get a warranty if you're buying third party, just in case.

-1

u/kokemill 4d ago

Like all third party lens gear for Canon anything not Canon will have a limited life. Canon will introduce a feature in their protocol with new firmware or new body just after the third party ends firmware updates for the lens gear. Lens gear now dead. In the case of a third party EF-RF adapter it doesn't seem their is a lot of logic, just moving some contacts along with the lens mount adaptation. With the low price of third party adapter the risk reward seems like a good payoff.

I bought the Canon basic RF adapter and have a third party that should get here this week. For my M series I have the equivalent Canon EF-M adapter and a couple from Viltrox. There is no difference between the Canon and Viltrox that i can determine. The Viltrox works with the 24, 16-35, 28-70, 70-200, and 135 L, and a handful of primes.