Testing old lenses.

Its very useful, thanks!

BK

 

Yes, really useful, thanks.
Is the Canon nFD the same as the FD or are they different things?

 

The original FD lenses used a breech-lock mount where you positioned the lens against the camera body and rotated a breech (sliver ring in pic below) at the back of the lens to lock it in place.

<a href="http://www.flickr.com/photos/55915417@N08/5285286522/" title="IMG_5992 by Lucky.penguin, on Flickr">

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"500" height="333" alt="IMG_5992" /></a>

The nFD or new FD mount used the same camera mount but the lenses were modified to a bayonet style where you had to rotate the entire lens to lock it into position. The breech was removed as shown below. The new FD lenses are easier to mount one-handed.

<a href="http://www.flickr.com/photos/55915417@N08/5243299857/" title="IMG_5949 by Lucky.penguin, on Flickr">

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"500" height="333" alt="IMG_5949" /></a>

 

Is the nFD/FD mounting procedure immaterial on a m43 body given that you would need to use an adaptor?

 

Thanks for this. Any chance we can see the full-size pictures?

 

Thanks for the testing and images.

 

This is quite a helpful resource, thanks!

If you have more time, it would be good to get some more types of sample images for the lenses tested, such as portraits, landscapes, etc. Portraits would be nice, as the crop factor makes many normal adapted lenses into decent options for portrait lenses. Not that I'm not grateful for the samples you have!

 

The same mounting procedure applies when using an adpater, but all FD adapters have an aperture lock ring (where lock and open are printed on the pictures above) which which activates the aperture stop-down lever on the back of the lens mount. Unlike other bayonet mounts the base of the FD and nFD lenses do not rotate during mounting so there is no way to automatically move the stop-down lever into position. This is true for the new FD lenses as well because even though you rotate the body of the lens to mount it, the base of the lens does not move. The lock ring must be moved back to the open position to remove the lens.