No complaints so far with this lens. Using it on my EOS 300. Great looking, sharp images at the lower zoom rates and completely acceptible and actually pretty darn good images at fullest zoom. With my testing so far it's plenty fast as long as you use a tripod at the longest zoom lengths. No prob for me since I most always use a tripod while photographing.
Have not experienced the lens extending out fully when aimed downward like others have. I'd even have to say mine feels "quite right" in terms of resistance on the zoom ring.
Bottom line, this lens is great deal at this price!!!!! If you can spend more get the IS model or some L glass .....I can't!

This is another great Canon lens. I have used it for over a year now and the photos I have shot are great. Great for portraits and nearly all other photo ops. I would highly recommend this one.

I bought this item a few months ago but i didn't use it then...!
I started using it last week and the results were surprising and shoking!
I didn't get any decent fotograph-I was so mad that i didn't try it right away when i bought it...I paid for something i can't even use...

I bought this lens for my Rebel 2000 camera and have been very pleased with the results. I never use autofocus, but the AF feature when I played with it was very fast and accurate. I got the best pictures by using an all-around 800 Max film with this lens.

I have Canon's 75-300mm lens for almost a year and have examined it inside out. Unfortunately, I cannot admit that it's a good lens.

First of all, it doesn't have USM (Ultra Sonic Motor) and though having built-in AF motor, it is anyway VERY slow. And since telephoto lenses in general are for capturing high-speed events (like sport, running animals etc), its low-speed focusing makes it no good.

Secondly, its light-factor is quite low (4.0 for 75mm and only 5.6 for 300mm) what forces you to use either high-speed film (not lower than ISO400) or to shoot in the bright light (what's not possible everytime you shoot).

And the last, but not less important thing. I'm not good in mechanics, but what I know for sure is that Canon's 75-300mm lens produce unsharp pictures. No matter if you use a tripod or not, the pictures still are very unsharp which is very bad for images, being zoomed by 300mm.

Anyway, I'd recommend you to buy the lens of the same focal distance but in another configuration: Canon EF 75-300 F/4.5-5.6 IS USM. Although it's a bit expensive and as you see, the light factor is a bit lower, too, it has an USM and IS (Image Stabilizer) what makes focusing drastically super fast and the pictures become more sharper with the help of IS. This lens deserves a high attention. But not this one...