Rokkor Lens with Canon FD Mount

raid

raid

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I got here a 50mm macro Rokkor in FD mount. Is this a custom mount?
 

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I am unable to mount the lens on the Pellix for apertures greater than 5.6. This is something I want to figure out. Is it the Pellix?
 
Here are some pics of the lens mount.
 

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Ronnie,

There is no adapter on the lens. The lens mount has been changed to FD (or FL?).
 
Looks to be just one lever inside the mount (aperture stop down) so this is a FL, not FD, mount. Most curious as to why anybody would modify this lens to fit a Canon SLR.

Jim B.
 
I need to get production dates for the Canon 50 macro and for the Minolta 50 macro. If the Minolta was first, then there is a chance that this lens is a proto type lens that Canon engineers are trying out before they made the Canon macro lens. [dreaming!]
 
raid said:
I need to get production dates for the Canon 50 macro......
Click to expand...

The 50/3.5 FL Canon Macro was introduced in 1965. The FD version was introduced in 1973, the FDn version in 1979. All dates from the Canon Museum website.

I had the FDn version of this lens back in the 80's. Good lens as I recall.

Jim B.
 
raid said:
Ronnie,

There is no adapter on the lens. The lens mount has been changed to FD (or FL?).
Click to expand...

Not exactly. You can still see the Minolta lens flange; it has not been removed as part of the conversion. It appears that a Canon breechlock mount has been grafted onto the existing Minolta flange.

There doesn't appear to have been any attempt to alter the Minolta mount's diaphram lever. Does the diaphram lever move as you change f/stops? If it does it could be the reason for the mounting difficulties at certain f/stops.
 
Mackinaw said:
The 50/3.5 FL Canon Macro was introduced in 1965. The FD version was introduced in 1973, the FDn version in 1979. All dates from the Canon Museum website.

I had the FDn version of this lens back in the 80's. Good lens as I recall.

Jim B.
Click to expand...

Hi Jim,
Thanks for the production dates. My lens may be just a custom adapted lens by someone.
 
Dwig said:
Not exactly. You can still see the Minolta lens flange; it has not been removed as part of the conversion. It appears that a Canon breechlock mount has been grafted onto the existing Minolta flange.

There doesn't appear to have been any attempt to alter the Minolta mount's diaphram lever. Does the diaphram lever move as you change f/stops? If it does it could be the reason for the mounting difficulties at certain f/stops.
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Hi Dwig,

I need to check this out, but it is most likely the incompatibility of Minolta with Canon levers.
 
raid said:
I am unable to mount the lens on the Pellix for apertures greater than 5.6. This is something I want to figure out. Is it the Pellix?
Click to expand...

It looks more like an FL mount than an FD mount, so it probably needs to be shot in stop-down mode (does the pellix have that? I don't have one).

The FD lenses have a little stub which presses a button in the camera; how far the button gets pressed in tells the camera the maximum aperture of the lens. The FL lenses don't have this stub, so they just register as 5.6.
 
Iamzip,
Yes, this is an FL mount. The 5.6 aperture is as much as the aperture lever can be turned when mounting the lens.
 
iamzip said:
It looks more like an FL mount than an FD mount, so it probably needs to be shot in stop-down mode (does the pellix have that? I don't have one).
...
Click to expand...

The Pellix, like its contemporary the FT, is an FL-class camera. It doesn't support full aperture metering with FD lenses.
 
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