I have a Rokinon 14mm f/2.8 lens with the EF mount and AE control which I normally use on my EOS 6D MkII with no issues.
When I bought the R10 2 years ago I also bought a Viltrox EF-R2 adapter.
This combo works flawlessly with all my EF lenses on the R10 except the Rokinon.
With that lens the camera locks up as soon as I press the shutter button. Only way to free it is to pull the battery & that's not a good thing to do.
Tried it on a friend's R5 with the same results both with my adapter & his Canon one.
Here's where it gets interesting.
Earlier this week I was at Gene's Camera in South Bend. While my buddy was shopping, I was telling a sales rep about the issue.
At his suggestion I got the lens & and adapter from the car. We put it on a used R6 he had in stock and it worked perfectly. Also tried it with a used Promaster adapter with the same results.
Is there perhaps an R10 menu setting that could be changed so that this lens/adapter combo could be used on the R10? Have been looking through David Busch's R10 book and the manual with no luck.
Any help is appreciated.
