The must have latest generation mkII…
The dull version 70-200 by Canon, 77mm filter diameter, UV filter included.
Can be mounted on fill frame or cropped sensor.
Can be used with the Extender x2 or x1.4.
Collar included for better support on tripod.
This is the new updated version from 2011 with Image Stabiolisation and a maximum apperture of 2.8.