This lens is ideal for sports and wildlife photography. The newly designed optical system has one fluorite element and two UD-glass elements to obtain high resolution and high contrast. Also, the minimum focusing distance was reduced to 18 ft. (5.5m). Extender EF 2x II can be attached to increase the focal length to 1200mm while retaining AF (at the center focusing point with the EOS-1v and EOS-3).
6High-performance L-series super-telephoto with dual-mode Image Stabilizer function
Ultra-high image quality with Fluorite and UD Glass
High AF speed with improved Ring USM and algorithms for focus prediction
Magnesium alloy lens barrels
Pros: Fast auto-focus, Superior build quality, Super-sharp images, is system is unreal !
Cons: weight lifting machine
The Canon EF600MMF4L IS USM lens is unbelievable. I wish I could upload just one image I have taken with it. Also I had the EF500MMF4L for 4 days and returned it for this lens. The only complaint is the draw string for the lens cap, which came apart, then the plastic adjuster broke. Also it is long enough that is interferes with the mounting shoe when the sun shade is in the reverse position. But it is one heck of a lens. Plus I'll have arms like Arnold by the end of the summer.
Pros: fast af in every modes, super sharp in details from edge to edge, great/ beautiful colors contrast, perfected shallow dof. for birds photography
Cons: too heavy for handheld for 20 minutes.
I already have 9 Canon " L " Lenses and 5 regular Canon Lenses--This Lens 600 MM. F/ 4.0 L IS USM are the best Canon Lens that I ever have-Super Fast in AF. and Great AI servo AF, -Super Sharp in Details, Great / Beautiful contrast of Colors and Great Shallow DOF. for Bird Photography. Yes, I just have this babe for 2 weeks and fell in love with her all over again and again. Yes, This Babe is worth every pennies that I spend.
Pros: Fast auto-focus, Superior build quality, Super-sharp images, reliability, retain its value, canon quality and name
I bought this lens 6 years ago and have used it in several trips to Africa and other photo trips. In spite the fact I had dropped from top of a jeep down to the ground, exposed to rain, dust, vibration, and many, many trips, this lens is still as sharp as the first day I bought it. It is built like a tank. Many pictures taken with the 1.4 and 2.0 X extenders would look phenomenal as long as one knows how to get the best exposure and minimize vibration. No other lens would come even close at this focal range. It is worth every penny!
Pros: Super-sharp images, Superior build quality, Fast auto-focus
I have used this lens for wild life and it is very hard to take a bad shot with this lens. The IQ and size are royal. It is built like a tank (including size). It is pretty fast at AF of fast moving subjects. You need to plan ahead your shooting, since it is a heavy lens. Used with a 1.4TCON along a crop body and you have some reach.