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Canon R7 with Rokinon/Samyang EF lens w/AE chip not working

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MRHengeveld

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Has anyone used a Rokinon or Samyang EF lens with AE chip via a Canon EF to RF adapter?

I recently got my R7, and while I don't use my Rokinon 85mm f1.4 manual lens with built-in AE chip much, I thought I'd try it with my R7. It didn't work. The manual focus guide was great, and I can see the IBIS working very well, but when I pressed the shutter, the R7 froze, and I had to take the battery out to reset it. I turned it on, and it worked again, but I then noticed it didn't show my aperture (in Av mode). Switched to manual, and it only shows the ability to change the shutter speed.

Has anyone else tried a AE chip lens with a R camera?
 
I had the 14mm with AE chip. I haven't tried with R7, but it worked with R6 and R5 for sure. No issues there.
 
My Samyang 35mm f/1.4 is fine with my EOS R, focus aid included, all my various M cameras and my 5Ds. Have you tried cleaning the contacts with isopropyl alcohol and a cotton bud?
 
I just had another chance to try it. Did the same thing.

I went through and tried every possible relevant setting:

Min and max aperture,

Changing what the dials did,

Shoot w/o lens attached.

Wiping the contacts is a good suggestion, but the shutter definitely closes when I press the shutter, just never opens again. I tested it with the Shoot w/o lens setting off, so if there was a dirty contact, I'd think it would not recognize a lens was attached in the first place? I'll try cleaning it later, though I keep my lenses clean...

I also tried every single mode on the dial.
 
Yes, I have this same issue with the Rokinon XP 50 1.2 and the Samyang SP 10 3.5 on the R7, though they work flawlessly on the R6.

I expected this to be fixed with the 1.2.0 R7 firmware update, but no.
 
randexter said:
Yes, I have this same issue with the Rokinon XP 50 1.2 and the Samyang SP 10 3.5 on the R7, though they work flawlessly on the R6.

I expected this to be fixed with the 1.2.0 R7 firmware update, but no.
Click to expand...
It's up to Samyang to fix this with updates, not Canon's, it's not a Canon product.
 
Last edited:
Sittatunga said:
randexter said:
Yes, I have this same issue with the Rokinon XP 50 1.2 and the Samyang SP 10 3.5 on the R7, though they work flawlessly on the R6.

I expected this to be fixed with the 1.2.0 R7 firmware update, but no.
Click to expand...
It's up to Samyang to fix this with updates, not Canon's, it's not a Canon product.
Click to expand...
Yeah, that's just canon being canon. Now even MF third party lenses are being blocked.
 
PAntunes said:
Sittatunga said:
randexter said:
Yes, I have this same issue with the Rokinon XP 50 1.2 and the Samyang SP 10 3.5 on the R7, though they work flawlessly on the R6.

I expected this to be fixed with the 1.2.0 R7 firmware update, but no.
Click to expand...
It's up to Samyang to fix this with updates, not Canon's, it's not a Canon product.
Click to expand...
Yeah, that's just canon being canon. Now even MF third party lenses are being blocked.
Click to expand...
I think Samyang's reverse engineering is a more probable explanation than Canon's malice - I'm sure Canon lose far more lens sales to Sigma than to Samyang, and they don't seem to be blocked.
 
Sittatunga said:
PAntunes said:
Sittatunga said:
randexter said:
Yes, I have this same issue with the Rokinon XP 50 1.2 and the Samyang SP 10 3.5 on the R7, though they work flawlessly on the R6.

I expected this to be fixed with the 1.2.0 R7 firmware update, but no.
Click to expand...
It's up to Samyang to fix this with updates, not Canon's, it's not a Canon product.
Click to expand...
Yeah, that's just canon being canon. Now even MF third party lenses are being blocked.
Click to expand...
I think Samyang's reverse engineering is a more probable explanation than Canon's malice - I'm sure Canon lose far more lens sales to Sigma than to Samyang, and they don't seem to be blocked.
Click to expand...
The reverse engineered lenses work fine on the R6 but not on the R7.

Why would canon "update" the EF protocol on a camera that doesn't use EF lenses natively? Did they released any update on any EF bodies?

Another user just had a similar experience with the R6II and a samyang 14 AF. It worked fine with the R6 but doesn't work with the R6II.

All of this after canon forced Samyang to stop selling RF lenses?

Sorry but I don't think this was just a coincidence...
 
PAntunes said:
Sittatunga said:
PAntunes said:
Sittatunga said:
randexter said:
Yes, I have this same issue with the Rokinon XP 50 1.2 and the Samyang SP 10 3.5 on the R7, though they work flawlessly on the R6.

I expected this to be fixed with the 1.2.0 R7 firmware update, but no.
Click to expand...
It's up to Samyang to fix this with updates, not Canon's, it's not a Canon product.
Click to expand...
Yeah, that's just canon being canon. Now even MF third party lenses are being blocked.
Click to expand...
I think Samyang's reverse engineering is a more probable explanation than Canon's malice - I'm sure Canon lose far more lens sales to Sigma than to Samyang, and they don't seem to be blocked.
Click to expand...
The reverse engineered lenses work fine on the R6 but not on the R7.

Why would canon "update" the EF protocol on a camera that doesn't use EF lenses natively? Did they released any update on any EF bodies?

Another user just had a similar experience with the R6II and a samyang 14 AF. It worked fine with the R6 but doesn't work with the R6II.

All of this after canon forced Samyang to stop selling RF lenses?

Sorry but I don't think this was just a coincidence...
Click to expand...
It's no coincidence, but it's not necessarily aimed specifically at Samyang. Not unless Samyang have just copied Sigma's reverse engineering exactly. Incompetence is still more likely than deliberate design alterations against a single manufacturer.

If it were simply a matter of blocking lenses that identify themselves to the camera as Samyang they could get round that easily by identifying themselves as something else - Sigma lenses used to identify themselves as completely different Canon lenses for decades until impossible peripheral illumination corrections caught up with them.
 
Sittatunga said:
PAntunes said:
Sittatunga said:
PAntunes said:
Sittatunga said:
randexter said:
Yes, I have this same issue with the Rokinon XP 50 1.2 and the Samyang SP 10 3.5 on the R7, though they work flawlessly on the R6.

I expected this to be fixed with the 1.2.0 R7 firmware update, but no.
Click to expand...
It's up to Samyang to fix this with updates, not Canon's, it's not a Canon product.
Click to expand...
Yeah, that's just canon being canon. Now even MF third party lenses are being blocked.
Click to expand...
I think Samyang's reverse engineering is a more probable explanation than Canon's malice - I'm sure Canon lose far more lens sales to Sigma than to Samyang, and they don't seem to be blocked.
Click to expand...
The reverse engineered lenses work fine on the R6 but not on the R7.

Why would canon "update" the EF protocol on a camera that doesn't use EF lenses natively? Did they released any update on any EF bodies?

Another user just had a similar experience with the R6II and a samyang 14 AF. It worked fine with the R6 but doesn't work with the R6II.

All of this after canon forced Samyang to stop selling RF lenses?

Sorry but I don't think this was just a coincidence...
Click to expand...
It's no coincidence, but it's not necessarily aimed specifically at Samyang. Not unless Samyang have just copied Sigma's reverse engineering exactly. Incompetence is still more likely than deliberate design alterations against a single manufacturer.

If it were simply a matter of blocking lenses that identify themselves to the camera as Samyang they could get round that easily by identifying themselves as something else - Sigma lenses used to identify themselves as completely different Canon lenses for decades until impossible peripheral illumination corrections caught up with them.
Click to expand...
Why would it be incompetence? There are other RF cameras that work fine with those lenses. There was no alteration of the EF protocol on any EF camera. There was no reason to change the way EF worked. But somehow the new RF cameras block samyang lenses.

That's not incompetence.
 
PAntunes said:
Sittatunga said:
PAntunes said:
Sittatunga said:
PAntunes said:
Sittatunga said:
randexter said:
Yes, I have this same issue with the Rokinon XP 50 1.2 and the Samyang SP 10 3.5 on the R7, though they work flawlessly on the R6.

I expected this to be fixed with the 1.2.0 R7 firmware update, but no.
Click to expand...
It's up to Samyang to fix this with updates, not Canon's, it's not a Canon product.
Click to expand...
Yeah, that's just canon being canon. Now even MF third party lenses are being blocked.
Click to expand...
I think Samyang's reverse engineering is a more probable explanation than Canon's malice - I'm sure Canon lose far more lens sales to Sigma than to Samyang, and they don't seem to be blocked.
Click to expand...
The reverse engineered lenses work fine on the R6 but not on the R7.

Why would canon "update" the EF protocol on a camera that doesn't use EF lenses natively? Did they released any update on any EF bodies?
Click to expand...
Click to expand...
Click to expand...
PAntunes said:
PAntunes said:
PAntunes said:
Another user just had a similar experience with the R6II and a samyang 14 AF. It worked fine with the R6 but doesn't work with the R6II.
Click to expand...
Click to expand...
Click to expand...
PAntunes said:
PAntunes said:
PAntunes said:
All of this after canon forced Samyang to stop selling RF lenses?

Sorry but I don't think this was just a coincidence...
Click to expand...
It's no coincidence, but it's not necessarily aimed specifically at Samyang. Not unless Samyang have just copied Sigma's reverse engineering exactly. Incompetence is still more likely than deliberate design alterations against a single manufacturer.

If it were simply a matter of blocking lenses that identify themselves to the camera as Samyang they could get round that easily by identifying themselves as something else - Sigma lenses used to identify themselves as completely different Canon lenses for decades until impossible peripheral illumination corrections caught up with them.
Click to expand...
Why would it be incompetence? There are other RF cameras that work fine with those lenses. There was no alteration of the EF protocol on any EF camera.
Click to expand...
The EF protocol and the way in which Canon uses it has continually evolved. Film era Sigma EF mount lenses generally won't work on digital Canon cameras. Lenses using apertures faster than the maximum aperture of the lens they have identified themselves as make pretty concentric circles in the image when peripheral illumination correction is switched on. A lot of lenses stopped working when Canon reduced the amount of power their cameras supplied to EF lenses. Depending on your world view you could say that is Canon trying to make the most of their system or that it is Canon bent on world domination by unfairly destroying the competition. For myself I tend to discount conspiracy theories; general incompetence and carelessness is much more likely.
PAntunes said:
There was no reason to change the way EF worked. But somehow the new RF cameras block samyang lenses.

That's not incompetence.
Click to expand...
The RF lens cap is an example of incompetence. If this were a deliberate attack on Samyang I would have expected all the other recent Canon camera updates to stop Samyang lenses working on the various bodies. I think it's just carelessness and not being particularly bothered about keeping the leeches third parties happy. Remember, this is just Canon's proprietary mount and protocol, not some internationally agreed standard. Whatever the reason, it's Samyang's job to make sure Samyang lenses work as intended, not Canon's. I own five Samyang lenses - how many do you have?
 
Sittatunga said:
PAntunes said:
Sittatunga said:
PAntunes said:
Sittatunga said:
PAntunes said:
Sittatunga said:
randexter said:
Yes, I have this same issue with the Rokinon XP 50 1.2 and the Samyang SP 10 3.5 on the R7, though they work flawlessly on the R6.

I expected this to be fixed with the 1.2.0 R7 firmware update, but no.
Click to expand...
It's up to Samyang to fix this with updates, not Canon's, it's not a Canon product.
Click to expand...
Yeah, that's just canon being canon. Now even MF third party lenses are being blocked.
Click to expand...
I think Samyang's reverse engineering is a more probable explanation than Canon's malice - I'm sure Canon lose far more lens sales to Sigma than to Samyang, and they don't seem to be blocked.
Click to expand...
The reverse engineered lenses work fine on the R6 but not on the R7.

Why would canon "update" the EF protocol on a camera that doesn't use EF lenses natively? Did they released any update on any EF bodies?

Another user just had a similar experience with the R6II and a samyang 14 AF. It worked fine with the R6 but doesn't work with the R6II.

All of this after canon forced Samyang to stop selling RF lenses?

Sorry but I don't think this was just a coincidence...
Click to expand...
It's no coincidence, but it's not necessarily aimed specifically at Samyang. Not unless Samyang have just copied Sigma's reverse engineering exactly. Incompetence is still more likely than deliberate design alterations against a single manufacturer.

If it were simply a matter of blocking lenses that identify themselves to the camera as Samyang they could get round that easily by identifying themselves as something else - Sigma lenses used to identify themselves as completely different Canon lenses for decades until impossible peripheral illumination corrections caught up with them.
Click to expand...
Why would it be incompetence? There are other RF cameras that work fine with those lenses. There was no alteration of the EF protocol on any EF camera.
Click to expand...
The EF protocol and the way in which Canon uses it has continually evolved. Film era Sigma EF mount lenses generally won't work on digital Canon cameras. Lenses using apertures faster than the maximum aperture of the lens they have identified themselves as make pretty concentric circles in the image when peripheral illumination correction is switched on. A lot of lenses stopped working when Canon reduced the amount of power their cameras supplied to EF lenses. Depending on your world view you could say that is Canon trying to make the most of their system or that it is Canon bent on world domination by unfairly destroying the competition. For myself I tend to discount conspiracy theories; general incompetence and carelessness is much more likely.
Sittatunga said:
There was no reason to change the way EF worked. But somehow the new RF cameras block samyang lenses.

That's not incompetence.
Click to expand...
The RF lens cap is an example of incompetence. If this were a deliberate attack on Samyang I would have expected all the other recent Canon camera updates to stop Samyang lenses working on the various bodies. I think it's just carelessness and not being particularly bothered about keeping the leeches third parties happy. Remember, this is just Canon's proprietary mount and protocol, not some internationally agreed standard. Whatever the reason, it's Samyang's job to make sure Samyang lenses work as intended, not Canon's. I own five Samyang lenses - how many do you have?
Click to expand...
Honestly, I wouldn't upgrade firmware on any RF camera that is working with samyang lenses before having a confirmation that they work...
 
PAntunes said:
Honestly, I wouldn't upgrade firmware on any RF camera that is working with samyang lenses before having a confirmation that they work...
Click to expand...
Do you still have one to upgrade? And do you not trust Samyang to update your lens?
 
Last edited:
Sittatunga said:
PAntunes said:
Sittatunga said:
PAntunes said:
Sittatunga said:
randexter said:
Yes, I have this same issue with the Rokinon XP 50 1.2 and the Samyang SP 10 3.5 on the R7, though they work flawlessly on the R6.

I expected this to be fixed with the 1.2.0 R7 firmware update, but no.
Click to expand...
It's up to Samyang to fix this with updates, not Canon's, it's not a Canon product.
Click to expand...
Yeah, that's just canon being canon. Now even MF third party lenses are being blocked.
Click to expand...
I think Samyang's reverse engineering is a more probable explanation than Canon's malice - I'm sure Canon lose far more lens sales to Sigma than to Samyang, and they don't seem to be blocked.
Click to expand...
The reverse engineered lenses work fine on the R6 but not on the R7.

Why would canon "update" the EF protocol on a camera that doesn't use EF lenses natively? Did they released any update on any EF bodies?

Another user just had a similar experience with the R6II and a samyang 14 AF. It worked fine with the R6 but doesn't work with the R6II.

All of this after canon forced Samyang to stop selling RF lenses?

Sorry but I don't think this was just a coincidence...
Click to expand...
It's no coincidence, but it's not necessarily aimed specifically at Samyang. Not unless Samyang have just copied Sigma's reverse engineering exactly. Incompetence is still more likely than deliberate design alterations against a single manufacturer.

If it were simply a matter of blocking lenses that identify themselves to the camera as Samyang they could get round that easily by identifying themselves as something else -
Click to expand...
The Samyang 50mm f/1.2 XP identifies itself as the Canon EF 50mm f/1.2 L.
Sittatunga said:
Sigma lenses used to identify themselves as completely different Canon lenses for decades until impossible peripheral illumination corrections caught up with them.
Click to expand...
 
thunder storm said:
Sittatunga said:
PAntunes said:
Sittatunga said:
PAntunes said:
Sittatunga said:
randexter said:
Yes, I have this same issue with the Rokinon XP 50 1.2 and the Samyang SP 10 3.5 on the R7, though they work flawlessly on the R6.

I expected this to be fixed with the 1.2.0 R7 firmware update, but no.
Click to expand...
It's up to Samyang to fix this with updates, not Canon's, it's not a Canon product.
Click to expand...
Yeah, that's just canon being canon. Now even MF third party lenses are being blocked.
Click to expand...
I think Samyang's reverse engineering is a more probable explanation than Canon's malice - I'm sure Canon lose far more lens sales to Sigma than to Samyang, and they don't seem to be blocked.
Click to expand...
The reverse engineered lenses work fine on the R6 but not on the R7.

Why would canon "update" the EF protocol on a camera that doesn't use EF lenses natively? Did they released any update on any EF bodies?

Another user just had a similar experience with the R6II and a samyang 14 AF. It worked fine with the R6 but doesn't work with the R6II.

All of this after canon forced Samyang to stop selling RF lenses?

Sorry but I don't think this was just a coincidence...
Click to expand...
It's no coincidence, but it's not necessarily aimed specifically at Samyang. Not unless Samyang have just copied Sigma's reverse engineering exactly. Incompetence is still more likely than deliberate design alterations against a single manufacturer.

If it were simply a matter of blocking lenses that identify themselves to the camera as Samyang they could get round that easily by identifying themselves as something else -
Click to expand...
The Samyang 50mm f/1.2 XP identifies itself as the Canon EF 50mm f/1.2 L.
thunder storm said:
Sigma lenses used to identify themselves as completely different Canon lenses for decades until impossible peripheral illumination corrections caught up with them.
Click to expand...
Click to expand...
In that case, it's not Canon blocking the lens because it's a Samyang, the lens isn't working on the R7 because the reverse engineering wasn't thorough enough. Because Canon aren't going to do something with the R7 that would require firmware updates to all the EF lenses they're holding spares parts for, as that would hurt their own sales.
 
Last edited:
MRHengeveld said:
Has anyone used a Rokinon or Samyang EF lens with AE chip via a Canon EF to RF adapter?

I recently got my R7, and while I don't use my Rokinon 85mm f1.4 manual lens with built-in AE chip much, I thought I'd try it with my R7. It didn't work. The manual focus guide was great, and I can see the IBIS working very well, but when I pressed the shutter, the R7 froze, and I had to take the battery out to reset it. I turned it on, and it worked again, but I then noticed it didn't show my aperture (in Av mode). Switched to manual, and it only shows the ability to change the shutter speed.

Has anyone else tried a AE chip lens with a R camera?
Click to expand...
Does your R7 recognize your Rokinon 85mm f1.4 as a f1.4 lens or a xyz mm lens?

My AE chip Rokinon does not work with R6 mark ii but works with R6: https://www.dpreview.com/forums/post/66820547
 
MRHengeveld said:
I just had another chance to try it. Did the same thing.

I went through and tried every possible relevant setting:

Min and max aperture,

Changing what the dials did,

Shoot w/o lens attached.

Wiping the contacts is a good suggestion, but the shutter definitely closes when I press the shutter, just never opens again. I tested it with the Shoot w/o lens setting off, so if there was a dirty contact, I'd think it would not recognize a lens was attached in the first place? I'll try cleaning it later, though I keep my lenses clean...

I also tried every single mode on the dial.
Click to expand...
If you want to use full-manual lenses without incident, one option is to get a non-electrical adapter like the Haoge or Urth, and the camera will behave exactly (electrically) as if there is no lens attached at all. You could also use tape, but the idea of putting tape somewhere where it can fall into the chamber scares me. I've only used tape on TCs where they would contact the TC pins on lenses.

With the tools the R7 has for manual focus, old-school "focus confirmation" may be unnecessary.
 
Last edited:
A solution could be to put some tape on the AE chip contacts so that there is no more communication between the chip and the camera body.

Fred
 
Last edited:
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