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Canon 28mm f2.8 m mount
Old 12-01-2019   #1
ekphrasis
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Canon 28mm f2.8 m mount

I inherited a Leica m3 and some various lenses along with it. One is a canon 28mm f2.8 that has the m bayonet Mount, not LTM. All of my research online about this lens has confused me: I have read a few threads in which the consensus was that this lens, which apparently was the type used by Garry Winogrand, was only offered in LTM and not the Leica M. It does not appear that the lens has an adaptor, and it definitely has M mount. Can others help me to ID the copy I have? Iím interested in getting a sense of the value.
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Old 12-01-2019   #2
retinax
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I'm fairly certain there's an adapter on it, they aren't very substantial and you could certainly mistake one as part of the lens. Google ltm-m adapters to get an idea what they look like.
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Old 12-01-2019   #3
aizan
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Pictures, please! It would be really cool if it does have an M-mount.
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Old 12-01-2019   #4
Timmyjoe
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I've got the LTM version of that lens and enjoy it quite a bit. It can be tack sharp on center, even wide open, but falls off quickly as you move toward the edges. After about f5.6 it's pretty nice across the field.

Would love to see pics of one with an M mount. Didn't know they existed.

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Old 12-01-2019   #5
shimokita
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Quote:
Originally Posted by ekphrasis View Post
... canon 28mm f2.8 that has the m bayonet Mount, not LTM ...
The Canon Lens Museum does not show the 28/2.8 in M-mount. Could you please post a photo showing the mount...
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Old 12-01-2019   #6
KEVIN-XU 愛 forever
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I believe none of the Japnese lens makers made M-mount lenses in the 1950s or so. There must be an adapter attach to the lens or been modified to M-mount which makes it looks like it was built in M-mount. Please post some pictures of this lens.

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Old 12-01-2019   #7
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Before Canon move into the SLR business, they only made LTM lenses.


Canon 25mm ,28mm Ltm Collection complete! by Kevin-Xu, on Flickr
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Old 12-01-2019   #8
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Canon never made a M-mount lens. If your lens doesn't have an adaptor, then it was modified by a camera tech sometime in the past. My Canon 50/0.95 lens is now in M-mount, thanks to Ken Ruth.

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Old 12-01-2019   #9
james.liam
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Probably either glued to the original thread mount or fused after 60 years in contact
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Old 12-01-2019   #10
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I too inherited an M3 with lenses, one, a very old telephoto. It looked like it was an M mount but, after leaving it in the sun one day, it warmed up enough that I could remove the adapter. It was tough to do since it probably hadn't been removed for at least 40 or more years but it did come off. Use the starfish technique to get it off. That is, just apply a firm steady pressure over time.
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Old 12-01-2019   #11
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now you have made me look very closely, and I'm wondering if it does actually have an adaptor that is somehow fused on. I had tried to unscrew it without luck, and then figured it was not an adaptor. I really don't know how to tell. I'm not sure how to attach images to the post--I haven't ever done that before. But I took a few with my iphone.

Also, it was a nightmare to log on--forum kept saying I didn't have valid credentials even though I reset my password.
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Old 12-01-2019   #12
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Quote:
Originally Posted by ekphrasis View Post
now you have made me look very closely, and I'm wondering if it does actually have an adaptor that is somehow fused on. I had tried to unscrew it without luck, and then figured it was not an adaptor. I really don't know how to tell. I'm not sure how to attach images to the post--I haven't ever done that before. But I took a few with my iphone.

Also, it was a nightmare to log on--forum kept saying I didn't have valid credentials even though I reset my password.
If you think it is not an adapter, I am very curious how it looks like. I suggest you can upload the photos on Flickr and share the link here.
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Old 12-01-2019   #13
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Quote:
Originally Posted by ekphrasis View Post
...I'm not sure how to attach images to the post--I haven't ever done that before. But I took a few with my iphone.

Also, it was a nightmare to log on--forum kept saying I didn't have valid credentials even though I reset my password.
https://www.rangefinderforum.com/for...d.php?t=117509
Suggest starting from the end for the most recent advice.
And when you log in make sure to check the "remember me" box.
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Old 12-02-2019   #14
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Quote:
Originally Posted by Mackinaw View Post
Canon never made a M-mount lens. If your lens doesn't have an adaptor, then it was modified by a camera tech sometime in the past. My Canon 50/0.95 lens is now in M-mount, thanks to Ken Ruth.

Jim B.
Canon never made a M-mount camera, so there is certainly no reason they'd make an M-mount lens. When installed, the LTM/M adapter looks like a thin metal plate on the lens base.

The LTM/M adapter is 1mm thick. When Leica developed the M-mount, they shortened the flange focal distance by 1mm to allow LTM lenses to be used with a thin adapter.
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Old 12-02-2019   #15
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Quote:
Originally Posted by AlwaysOnAuto View Post
Use the starfish technique to get it off. That is, just apply a firm steady pressure over time.
and a few character a to satisfy the forum software.
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