The Sideout Rocker
I am a professional wedding, event and portrait photographer, and my review will be directed more towards beginner photographers. There will be a higher learning curve than with more experienced photographers who have a solid grasp on shutter speed working in conjunction with focal length because there is no image stabilization (IS) on this lens. For videographers, a tripod or monopod is pretty much a must-have when shooting in lower light (even in the shade) that is not bright sunlight. There are ways to compensate for no IS with the most common being increasing the ISO. However, unless you have one of the more modern cameras like a Canon 70D or Canon 6D which produce much lower noise (distortion) at higher ISOs, you will more than likely need to make sure you have a flash to compensate for no IS. Build quality is solid; no plastic parts here. However, even with it being an L series lens, this does NOT have weather sealing. If you are a nature/outdoor photographer shooting in wet and dusty climates a lot, this is something to consider. For me, it is negligible. Image quality is excellent; what I expect from an L series lens. The other nice thing about this lens is that the aperture remains the same throughout the focal length as opposed to the cheaper lenses that have a "variable" aperture which means the aperture will change automatically as you zoom in. The weight of this lens is significantly less than the much pricier 70-200mm f/2.8 version which I have shot with numerous times. A lot of lenses produce soft images when shooting at its maximum aperture (or wide open). However, this lens produces sharp images at f/4. I shoot with both a Canon 7D and Canon 5D body. The 5D is a full frame camera body where the *viewable* focal length is 70-200mm. The Canon 7D is a crop-sensor body (as well as the Canon 10-70D and Rebel bodies) where the *viewable* focal length is 112-320mm. I already own a Tamron 17-50mm f/2.8 and a Canon 50mm 5/1.8 lens to help cover any low light shots. I also have a Canon 10/22 f/3.5-4.5 lens to cover wide angle shots. So, the 70-200mm f/4 compliments what I already have. In conclusion, and in my humble opinion, there is no lens that comes close in image quality at this price range; this is the most affordable of the Canon "L" series lineup. However, for beginners, expect a little more of a learning curve in using this lens properly and knowing when to use it. If IS is a must-have for you and you dont mind paying a little more, then get the f/4 IS version which is right at about $1000. But if you want the L series image quality at an affordable price, this is it!