I was out and about a few days ago and saw someone with a lens I couldn't make any sense of... It was definitely a white canon lens, but it appeared very small... nearly 1/2 the size of my 70-200 f/2.8 IS. The only lens I could think of that this could be is a 70-200 f/4, though, I've seen side by side pictures of these two lenses and the 70-200 f/4 seems quite a bit larger than the lens in question. Perhaps the guy holding this lens was a bit large, or it was just a trick of light, but I just had to ask... is there a current lens or discontinued canon white lens out there that is about 1/2 the size of the 70-200 f/2.8 IS that I am overlooking?
Thanks for your time...

. Again, side by side the f/4 looks a little too big. Granted that is probably the lens I saw, but I figured I'd ask in case someone knew something I didn't.

