EF 24 F2.8 Feels funny when I mount it on my 5D ?

You have a "non L" lens and are attaching it to what is essentially a "non L" body. Your experience sounds like a typical "non L" experience. What are you hoping for? Does the lens work on the body?

I don't mean to sound "elitist". Despite the myths about how good the 5D and some non L primes are, there is still an aesthetic difference between them and their much higher priced counterparts.

"Despite the myths about how good the 5D and some non L primes are, there is still an aesthetic difference between them and their much higher priced counterparts."

Just how does the "click" when you mount a lens differe between the professional premium bodies and lenses and the stuff the masses use? Is it a more musical note?

Fine, my comment wasn't intended to disparage the 5D. If you can't justify the 1Ds3, the 5D is the next best thing. And if you can't justify the cost of an "L" lens, then a non L lens is the next best thing.

In short, if you "love" your 5D, you'd have a head-over-heels love-at-first-sight nothing-held-back love-hunger-craziness for the 1D series. If this equation ever changes, I would suppose that Canon stops offering the 1Ds series at 4x the cost of the 5D. Professionals who buy the more expensive bodies do it for a reason, IMO. It's not an ego thing...If I could get 1Ds results at 25% of the cost, I'd do it in a second. Unfortunately though, it ain't happenin' anytime soon.

Jon, if your lens isn't clicking when you mount it, and isn't mounting smoothly, there is possibly something wrong with it. I would send it back and get another.

I had a lens ounce that didn't mount properly. The replacement was fine.

I don't know but my non L lens the 100mm f/2.8 Macro USM makes the same click as the 24-105mm F4L IS USM and 100-400mm F4.5-5.6L IS USM. Personally I would take it to a trusted camera shop perferably Canon certified and have them check. Or maybe just call Canon and ask them, better to sound like an idiot if nothen is "funny" than mess up eather the lens or the camera. Just my 2cents worth.

The 1D series have an rubber o-ring and many L lenses also have an o-ring. So when you mount the two it feels tighter and very different than cameras and lenses with o-rings. With that said, my EF 24 2.8 is a bit looser turning than my L optics with o-rings but is solid otherwise.

You might check the lens and make sure all the screws are tightened down in the mount area. If one is sticking up the lens may not rotate all the way when mounting. I've had a few work loose over the years. A couple turns with a small screwdriver and all was well.

I don't hear or feel any difference when mounting L or non L glass on the 5D.

"I don't hear or feel any difference when mounting L or non L glass on the 5D."

You must have the "Made in Canada" models!

>>You must have the "Made in Canada" models!<<

No, no. I just don't hear any difference between my 70-200 IS and my 50 1.4.

The zoom has perhpas a slighter increase around 976hz, probably due to the deeper cavity where the rear element is mounted. However, in tests performed in an anecoic chamber using an Earthworks measurement microphone these differences in clcik frequencies maybe further investigated by those who feel troubled by my empirical finding. I must admit Santa Monica BLVD is pretty noisy...