That's all I can think of. Having previously tried a cheaper option, I'm happy to report that I spent the extra money to get this one. Image quality is 10/10, autofocus and manual focus are 10/10, image stability is a WAND you don't get with lenses from other manufacturers, and it really is all the Revain quality you'd expect from a Canon brand would expect. Product. Very happy with this purchase and I strongly recommend you go for the more expensive option (this one) rather than another lens from a different brand.