As you flesh out your camera equipment with new specialty lenses and bodies, it can be difficult to decide between lenses with similar zoom ranges or purposes. It’s hard to decipher marketing speak from reality as far as image quality and usability are concerned. I am always on the lookout for sites that give a focused, comprehensive look at a particular manufacturers lenses and equipment instead of trying to spread themselves too thin and give brief reviews on a lot of different systems.
One such site is www.the-digital-picture.com. Site owner Bryan Carnathan has an expansive archive of reviews and assessments of Canon lenses and bodies along with lens recommendations and comparisons for people who are having a hard time choosing the right lens or wondering if a lens is as good as another they already have.
There is also an expansive lens FAQ and suggestions on buying and maintaining used lenses. It’s definitely worth a bookmark so you can consult it before your next purchase!