EF mount mechanical drawings Source?

<p>I'm looking for mechanical drawings that show the Canon EF mount I would need both sides. Anything with dimensions would be great.<br>

I been the Bing and Google routes so far no luck.</p>

<p>Maybe something <a href="http://www.f20c.com/stuff/canon/partslist/">HERE</a>?</p>

<p>Perhaps here somewhere:<br /> http://www.freepatentsonline.com/result.html?query_txt=canon+mount+lens&sort=relevance&srch=top or http://www.freepatentsonline.com/result.html?query_txt=canon+bayonet+camera&sort=relevance&srch=top&search=</p>

<p>I've never seen a detailed technical drawing with all the mechanical specifications of the EF series mount on it.</p>

<p>My best suggestion would be to remove the mount from a lens (fairly easy to do) and make your own measurements on it. I'm sure that's what all the 3rd party lens and adapter makers have done.</p>

<p>I'm sure that Canon does not publish the specification. Why make it easy for others to duplicate the design.</p>

<p>Well I guess when I get an EF mount lens and body I can do the drawings myself. I'll search through the patent drawings.</p>

<p>Buy a cheap extension tube and you'll get both front and rear mounts for pennies?</p>

<p>If you do end up doing some technical drawings, many of us would appreciate it if you would post them somewhere, even here.</p>

<p>Here's a drawing of a side view of the Canon mount from Tamron's instructions for their 90mm macro, but I don't imagine that this is of much use to you.</p><div></div>