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RMC Tokina 24mm 2,8 aperture problem
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PostPosted: Fri Dec 04, 2015 9:58 pm    Post subject: RMC Tokina 24mm 2,8 aperture problem Reply with quote
Hi! Bought a RMC Tokina 24mm 2,8 from the local market. I had plans to use it in front of my Canon 7D. Tokina have a Minolta MD mount. Maybe I am doing something wrong but I suspect that something is broken. If I move the aperture ring nothing don't move. If I press/move the lever on the mounting side of the lens, still nothing. I am pretty sure that the lever on the mounting side should close the aperture!?? Am I wrong? Any tricks? I am pretty noob with manual lenses, especially with Minolta lenses.


PostPosted: Sat Dec 05, 2015 2:35 pm    Post subject: Reply with quote
1. By the sound of it the lens has oily aperture and will require service.
2. MD mount is not a good option for Canon EF to begin with.


PostPosted: Sat Dec 05, 2015 4:49 pm    Post subject: Reply with quote
Gardener wrote:
1. By the sound of it the lens has oily aperture and will require service.
2. MD mount is not a good option for Canon EF to begin with.


Why MD mount isn't good option for EF mount? Rolling Eyes


PostPosted: Sat Dec 05, 2015 5:29 pm    Post subject: Reply with quote
Because MD register distance is shorter than EF, meaning that you can't use a simple glassless adapter and achieve focus past few feet if that.


PostPosted: Tue Dec 22, 2015 2:23 pm    Post subject: Reply with quote
There is an excellent Wiki page about flange distances for all types of lens mounts and their adapters.
Shouldn't this be in a sticky or is it already there ?

here
https://en.wikipedia.org/wiki/Flange_focal_distance
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