Would an adapter labeled "Minolta MD/MC" work with a Minolta SR lens?

[OrdinarilyInordinate]

I'm looking to get a lens adapter for my Vivitar Series 1 90mm f/2/5 lens that has a Minolta SR mount. The lens has a QC sticker from 1976.

I have noticed that most Minolta adapters note that they are compatible with Minolta MD and MC mounts, and only like one so far that lists compatibility with all 3 Minolta mounts: SR, MC, and MD.

Would an adapter that's listed for MC/MD be backwards compatible with an SR-mount lens?

Thank you.

 

[petrochemist]

Yes, MD & MC are subsets of SR mount. Most SR lenses are either MC or MD.

 

[Brian Chichester]

The SR bayonet dimensions remained the same up to the end of the MD line. The MC and MD variants only related to the aperture lever linkage, which enabled more exposure automation in later cameras.

So in terms of 'dumb' adapters, they're all the same. If you are adapting to mirrorless digital, the aperture lever has no function.

 

[OrdinarilyInordinate]

Perfect, thank you. There's a moving "pin" in the lens mount, and I wasn't sure if it needs to be caught correctly by an adapter, and whether the different versions of the Minolta mount would need a specialized design for the "dumb" adapters.

I'm trying to adopt my Minolta SR mount lens to a Fujifilm X mount camera.

 

[QuietOC]

I'm looking to get a lens adapter for my Vivitar Series 1 90mm f/2/5 lens that has a Minolta SR mount. The lens has a QC sticker from 1976.

I have noticed that most Minolta adapters note that they are compatible with Minolta MD and MC mounts, and only like one so far that lists compatibility with all 3 Minolta mounts: SR, MC, and MD.

Would an adapter that's listed for MC/MD be backwards compatible with an SR-mount lens?

Thank you.

MC and MD on those adapters are technically misnomers as those adapters are neither meter coupled nor read the minimum diameter of any lens. They should all just be labelled Minolta SR.

 

[Lightshow]

As the other posters have said, MC & MD are both SR mounts, this only matters if you are mounting the lens on a native SR mount camera, adapters don't care because there is no communication between the lens and adapter/camera, the lenses are only used in a fully manual manor, so if it fits it should work.

Canon FD SSC and nFD are the only lens mounts that I know of that require pins to be in the proper position for the lens to work properly, every other legacy mount I've used will work when it's not mounted, more specifically the FD lenses only require the breech lock ring to be turned to allow the aperture to function, FD SSC lenses require a pin to be pressed which permits the breech ring to turn, they are otherwise the same, nFD requires 2 pins and the mount to rotate for the aperture to become functional, it is by far the most complicated interlock system to be implemented (that I've used) till digital communication pins.

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[petrochemist]

As the other posters have said, MC & MD are both SR mounts, this only matters if you are mounting the lens on a native SR mount camera, adapters don't care because there is no communication between the lens and adapter/camera, the lenses are only used in a fully manual manor, so if it fits it should work.

Canon FD SSC and nFD are the only lens mounts that I know of that require pins to be in the proper position for the lens to work properly, every other legacy mount I've used will work when it's not mounted, more specifically the FD lenses only require the breech lock ring to be turned to allow the aperture to function, FD SSC lenses require a pin to be pressed which permits the breech ring to turn, they are otherwise the same, nFD requires 2 pins and the mount to rotate for the aperture to become functional, it is by far the most complicated interlock system to be implemented (that I've used) till digital communication pins.

Quite a few M42 lenses will need the rear pin pressed in for the aperture to close down. The earliest didn't have the pin, then came lenses with an A/M switch (only using the pin in A) then the later models were auto only requiring the pin to be pressed. With the right M42 adapter this pin will be pressed as the lens is screwed on so might be less of an issue.

I think OM lenses only shut down if the DOF preview button on the lens is pressed.

 

[Lightshow]

As the other posters have said, MC & MD are both SR mounts, this only matters if you are mounting the lens on a native SR mount camera, adapters don't care because there is no communication between the lens and adapter/camera, the lenses are only used in a fully manual manor, so if it fits it should work.

Canon FD SSC and nFD are the only lens mounts that I know of that require pins to be in the proper position for the lens to work properly, every other legacy mount I've used will work when it's not mounted, more specifically the FD lenses only require the breech lock ring to be turned to allow the aperture to function, FD SSC lenses require a pin to be pressed which permits the breech ring to turn, they are otherwise the same, nFD requires 2 pins and the mount to rotate for the aperture to become functional, it is by far the most complicated interlock system to be implemented (that I've used) till digital communication pins.

I knew I was going to miss a lens or two because I was tired and didn't feel like double checking, thanks for catching my fumble.

Quite a few M42 lenses will need the rear pin pressed in for the aperture to close down. The earliest didn't have the pin, then came lenses with an A/M switch (only using the pin in A) then the later models were auto only requiring the pin to be pressed. With the right M42 adapter this pin will be pressed as the lens is screwed on so might be less of an issue.

Yes, I did overlook that there are some M42 lenses that do require the pin being pressed because they lack the A/M switch.

I think OM lenses only shut down if the DOF preview button on the lens is pressed.

Nope, OM aperture lever is enabled by a pin in the adapter, the button is a secondary method to stop down to the set value (the primary being through the camera during exposure), it was only for previewing DOF, most other camera systems had this feature in the camera rather than the lens if they had it at all.

Some Minolta MC had a DOF button (not really a button) on the lens, it was omitted on some lenses like my 58/1.2, I'm not sure why, perhaps it was too difficult to implement.

It sure is a pain trying to keep all the different mounts features and the their lens lineup's aperture and focal lengths straight in my head, the normals for me tend to blur into each other, I'll write down what I'm sure it is, then pause for a moment then go double check that I got it right... I seem to get it right 70% of the time.

50, 52, 55, 57, 58mm, f2.8, f2.5, f2.2, f2, f1.9, f1.8, f1.7, f1.5, f1.4, f1.2