Identifying Lens Mount

4 months 1 week ago #691315 by LeBlur
Can anyone identify this Lens Mount?



The cover cap is just marked as 'Four Thirds'.
The lens is a Sigma 55-200mm DC but I'm not sure what camera it is designed for.
I have a Sony Nex 7 so I'm wanting to buy the correct adaptor for it.
Thanks for any help.


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4 months 1 week ago #691344 by garyrhook
Micro 4/3s is a system of mirrorless cameras. Panasonic, Fuji, Olympus, etc all make products for the system, which are interchangeable.

A Sony NEX-7 is a E-mount body (mirrorless) with an APS-C sensor (larger than micro 4/3s).

At least one adapter is available for micro 4/3 lenses on a E mount.

I should think you'll get vignetting, but perhaps not.


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4 months 1 week ago #691346 by LeBlur
Thanks Gary.
I was hoping to find out which camera make the lens is for, or is this the same mount used by all Four Thirds cameras?


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4 months 1 week ago #691347 by Screamin Scott
I'd venture to guess that this is the older Four-Thirds mount and not the Micro Four Thirds version. They are not interchangeable..

Scott Ditzel Photography

www.flickr.com/photos/screaminscott/

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4 months 1 week ago #691353 by LeBlur
Thanks Scott,

So is the mount on the lens just a generic 'Four-Thirds' mount or is it specific to a camera make with their own 'Four-Thirds' version of a mount?


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4 months 1 week ago #691355 by Screamin Scott
Four-Thirds (4/3) was the precursor to the Micro Four Thirds mount (M4/3) and is a larger diameter mount.. IIRC, only Olympus offered Four-Thirds mounts (other than 3rd party offerings for Olympus cameras) for their "E" series DSLRs. I have M4/3 cameras and as such I have to be careful when ordering lenses that they are the correct mount, otherwise, an adapter would be needed for them to fit. You should be able to find an adapter to fit the 4/3rds lenses to your camera, but why ? Adapted lenses usually lack features that non adapted lenses have.

Scott Ditzel Photography

www.flickr.com/photos/screaminscott/

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4 months 1 week ago #691358 by Screamin Scott
Some further reading... Seems as though Olympus started it, others joined in later...

https://en.wikipedia.org/wiki/Four_Thirds_system

Scott Ditzel Photography

www.flickr.com/photos/screaminscott/

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4 months 1 week ago #691359 by LeBlur
But Why? I picked up the 200mm zoom lens for £20. If I can get the right adaptor for it then it was worth a punt.


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4 months 1 week ago #691376 by garyrhook
Sorry, I haven't been involved long enough to know about 4/3s. The fact that there are only 9 connectors (my Pany lens has 11) explains the difference.

LeBlur wrote: But Why? I picked up the 200mm zoom lens for £20. If I can get the right adaptor for it then it was worth a punt.


For exactly the reason you're having to hunt: what you want may not exist.

Just because you got it for 20 quid doesn't make it a bargain if it can't be used. Just sayin'.


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4 months 1 week ago #691395 by LeBlur
I was just asking if anyone recognised the mount. It now looks as if it is not a Panasonic Four Thirds mount. 

I didn't say it was a bargain just that it was worth a punt. If I can't get an adaptor I'll just sell on or give away. 

Does anyone recognise the Mount? Could it be an Olympus? 


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4 months 1 week ago - 4 months 1 week ago #691404 by Screamin Scott
Four Thirds is Four Thirds no matter who the lens was made for. All you need to concern yourself with is the type of mount it is, not what camera line it was made for. Just like M42 screw mounts can fit a number of older SLR's regardless of brand, as long as they were M42 screw mount. The adapter for those would say for M42, not a camera brand...

Scott Ditzel Photography

www.flickr.com/photos/screaminscott/

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4 months 5 days ago #691577 by LeBlur
No eBay APP ID défined in Kunena configurationThanks Scott.

Looks like it is for an Olympus E-System Four Thirds camera.


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3 months 1 day ago #694729 by LeBlur
Managed to get hold of a 4/3 to Nex adaptor. Reasonably happy with the results, albeit in my inexperienced hands.


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3 months 1 day ago #694732 by LeBlur


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3 months 1 day ago #694734 by LeBlur
Thank you for everyone's help. I'm sure I'll get better with practise.
Cheers


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