This lens is great, that lens is great, my copy is awesome, your copy sucked. This is usually the extent of our ability to find out about lens quality. We have to dig through reviews, forum posts, and rely heavily on the opinions and perceptions of people that we do not know. Wouldn’t it be easier to have hard data to look at in regards to how often a lens needs repair or how often is has problems? Well now we have just such a list, courtesy of Lens Rentals.