canon 70-200mm ultrasonic zoom lens fit on a canon

[Javv10]

a canon 70-200mm ultrasonic zoom lens does not lock on my camera. It's a canon EOS rebel T2i. It was a gift and I need to know what should I do.

[diverhank]

It should work perfectly with your camera.  Did you try matching the lens red button with the camera red button (instead of white)?

[kvbarkley]

Is it an EF or EF-S lens? An FD or EF-M won't fit.

[RobertTheFat]

I don't think they make a 70-200mm EF-M.

[ebiggs1]

...and I don't think they made an 70-200mil ultrasonic either.  

[RobertTheFat]

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@ebiggs1 wrote:

...and I don't think they made an 70-200mil ultrasonic either.  

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Well, I just looked. Mine says "USM". I believe that stands for "UltraSonic Motor".

[ebiggs1]

" An FD or EF-M won't fit."

"Well, I just looked. Mine says "USM"."

The reply was in responce to your reply.  Not that they never made an Ultrasonic 70-200mm lens.  Yours is not an FD or EF-M is it?

Geez, it's a rough crowd aroud here! 

[ScottyP]

Maybe just the lens cap says ultrasonic. I have like 4 lenses with 77mm lens caps and one of my caps says Ultrasonic, but it floats around among the different lenses. If I sold a lens there'd be a 1 in 4 random chance that cap would go with it.

[RobertTheFat]

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@ScottyP wrote:

Maybe just the lens cap says ultrasonic. I have like 4 lenses with 77mm lens caps and one of my caps says Ultrasonic, but it floats around among the different lenses. If I sold a lens there'd be a 1 in 4 random chance that cap would go with it.

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Come on, Scott; I was born in the morning, but it wasn't this morning. (Actually, it was 80 years ago last Friday.) It says USM on the lens.

[kvbarkley]

I was just being complete, he might be listing FF equivalents for all we know.