Tim van der Leeuw
Senior Member
Time for an RF-to-M adapter?
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Time for someone to break the laws of physics?Time for an RF-to-M adapter?
Tim van der Leeuw
Senior Member
Please explain -- why would an adaptor for RF lenses to M mount not work? EF lenses can be adapted to the M mount.Time for someone to break the laws of physics?Time for an RF-to-M adapter?
Is this because the flange distance is too short, so the adapter needs to be impossibly thin? In that case, yeah, silly me, I forgot about that for a moment!
If there are other reasons, please enlighten a poor soul!
Cheers,
--Tim
Yes, the dimensions of the two mounts make adapting from one to the other physically impossible. RF to EF-M won't work and EF-M to RF won't work. The ONLY way to adapt one to the other would be with something like a 1.1X teleconverter.Please explain -- why would an adaptor for RF lenses to M mount not work? EF lenses can be adapted to the M mount.Time for someone to break the laws of physics?Time for an RF-to-M adapter?
Is this because the flange distance is too short, so the adapter needs to be impossibly thin? In that case, yeah, silly me, I forgot about that for a moment!
There are electrical issues too. RF lenses use a new high speed communication protocol. RF bodies are capable of communicating in the new RF protocol, or can automatically switch to the old, slow EF protocol. EF-M lenses are using a variation of the old EF protocol. So, EF-M bodies would be incapable of communicating with RF lenses. RF bodies could theoretically communicate with EF-M lenses.
Theoretically, the only possible combination that could be made to work would be an EF-M lens on a 1.1X teleconverter on an RF mount body running in crop mode. Pretty sure nobody wants that.
If there are other reasons, please enlighten a poor soul!
Cheers,
Tim van der Leeuw
Senior Member
Thank you for the explanations! 
PerfectMark
Forum Enthusiast
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Well they could update EF-M to support the RF protocols, then use a RF to EF-M teleconverter. That might work for people that want to use the RF telephoto lenses on newer EF-M cameras.Yes, the dimensions of the two mounts make adapting from one to the other physically impossible. RF to EF-M won't work and EF-M to RF won't work. The ONLY way to adapt one to the other would be with something like a 1.1X teleconverter.Please explain -- why would an adaptor for RF lenses to M mount not work? EF lenses can be adapted to the M mount.Time for someone to break the laws of physics?Time for an RF-to-M adapter?
Is this because the flange distance is too short, so the adapter needs to be impossibly thin? In that case, yeah, silly me, I forgot about that for a moment!
There are electrical issues too. RF lenses use a new high speed communication protocol. RF bodies are capable of communicating in the new RF protocol, or can automatically switch to the old, slow EF protocol. EF-M lenses are using a variation of the old EF protocol. So, EF-M bodies would be incapable of communicating with RF lenses. RF bodies could theoretically communicate with EF-M lenses.
Theoretically, the only possible combination that could be made to work would be an EF-M lens on a 1.1X teleconverter on an RF mount body running in crop mode. Pretty sure nobody wants that.
If there are other reasons, please enlighten a poor soul!
Cheers,
Although we should probably just assume that Canon is going to be like Fuji from now on (2 separate mounts which aren't compatible).
Miguel-C
Senior Member
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I mean, its just a larger mount, the sensor is the same size. I dont see why it wouldn't be possible, mind you it would be a slightly funnel shaped adapter like the Nikon Z adapter.Time for someone to break the laws of physics?Time for an RF-to-M adapter?
I mean, its just a larger mount, the sensor is the same size. I dont see why it wouldn't be possible, mind you it would be a slightly funnel shaped adapter like the Nikon Z adapter.Time for someone to break the laws of physics?Time for an RF-to-M adapter?
scrup
Leading Member
Maybe EF-M to R Mount Adapter?There is only 2mm of depth available for a RF to EF-M mount adapter. The mounting flange of an RF lens sticks out more than 2mm. The only way to make it fit would be to remove the flange from the RF lens. Even without any adapter, there is mechanical interference preventing the lens and camera from getting into the correct position.I mean, its just a larger mount, the sensor is the same size. I dont see why it wouldn't be possible, mind you it would be a slightly funnel shaped adapter like the Nikon Z adapter.Time for someone to break the laws of physics?Time for an RF-to-M adapter?
Quite simply, it can't fit.
Stuck a EFM lens into EF mount DSLR, there is not much room for an adapter and electronics so there goes that theory as well.
Canon really screwed the compatibility with these 2 mounts.
Just have to wait and see or wait for the next rumor.
I do understand people might want to use RF-lenses on M-body. But why anyone would like to use EF-M lenses on FF / R-body?? I have both the systems, and I have zero intetest to shoot with R + EF-M lens.Maybe EF-M to R Mount Adapter?There is only 2mm of depth available for a RF to EF-M mount adapter. The mounting flange of an RF lens sticks out more than 2mm. The only way to make it fit would be to remove the flange from the RF lens. Even without any adapter, there is mechanical interference preventing the lens and camera from getting into the correct position.I mean, its just a larger mount, the sensor is the same size. I dont see why it wouldn't be possible, mind you it would be a slightly funnel shaped adapter like the Nikon Z adapter.Time for someone to break the laws of physics?Time for an RF-to-M adapter?
Quite simply, it can't fit.
Stuck a EFM lens into EF mount DSLR, there is not much room for an adapter and electronics so there goes that theory as well.
Canon really screwed the compatibility with these 2 mounts.
Just have to wait and see or wait for the next rumor.
scrup
Leading Member
Easier migration to R mount when they start releasing crop cameras for it.I do understand people might want to use RF-lenses on M-body. But why anyone would like to use EF-M lenses on FF / R-body?? I have both the systems, and I have zero intetest to shoot with R + EF-M lens.Maybe EF-M to R Mount Adapter?There is only 2mm of depth available for a RF to EF-M mount adapter. The mounting flange of an RF lens sticks out more than 2mm. The only way to make it fit would be to remove the flange from the RF lens. Even without any adapter, there is mechanical interference preventing the lens and camera from getting into the correct position.I mean, its just a larger mount, the sensor is the same size. I dont see why it wouldn't be possible, mind you it would be a slightly funnel shaped adapter like the Nikon Z adapter.Time for someone to break the laws of physics?Time for an RF-to-M adapter?
Quite simply, it can't fit.
Stuck a EFM lens into EF mount DSLR, there is not much room for an adapter and electronics so there goes that theory as well.
Canon really screwed the compatibility with these 2 mounts.
Just have to wait and see or wait for the next rumor.
Sure if we are speaking about cropped R-body. I thought we discuss now about EF-M lenses on R-body (FF).Easier migration to R mount when they start releasing crop cameras for it.I do understand people might want to use RF-lenses on M-body. But why anyone would like to use EF-M lenses on FF / R-body?? I have both the systems, and I have zero intetest to shoot with R + EF-M lens.Maybe EF-M to R Mount Adapter?There is only 2mm of depth available for a RF to EF-M mount adapter. The mounting flange of an RF lens sticks out more than 2mm. The only way to make it fit would be to remove the flange from the RF lens. Even without any adapter, there is mechanical interference preventing the lens and camera from getting into the correct position.I mean, its just a larger mount, the sensor is the same size. I dont see why it wouldn't be possible, mind you it would be a slightly funnel shaped adapter like the Nikon Z adapter.Time for someone to break the laws of physics?Time for an RF-to-M adapter?
Quite simply, it can't fit.
Stuck a EFM lens into EF mount DSLR, there is not much room for an adapter and electronics so there goes that theory as well.
Canon really screwed the compatibility with these 2 mounts.
Just have to wait and see or wait for the next rumor.
Speaking of cropped R, I think/hope there will be such a camera, to replace 7D2, and to use with RF-lenses. I don't think Canon would replace current M-line with cropped R-line, though. At least not in the near future, because M sells apparently well.
scrup
Leading Member
There is only one body that sells well. So they need to replace it with another equally well priced body.
https://www.amazon.com/Best-Sellers...ectronics/3109924011/ref=zg_bs_nav_e_3_281052
The next body is at position 36 behind the RP.
People are just price sensitive. Canon just has to turn on the tap if they wanted crop bodies to sell in R mount.
How about the global sales? I've owned maybe 10 Canon cameras and never bought anything from Amazon.
Yes, some people are price sensitive, some are after performance, some are after something else. Different toys for different people / usage.
CQui
Senior Member
Sure legit, place orders now...
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