Focus ring
Nice and smooth
The front of the lens does not move or rotate when focusing
Auto-Focus
Very fast
Soft whirring if you listen closeby / silent
Sharpness
Full frame
70mm - center is sharp, corners are not sharp.
Can be sharper with a higher aperture (f/5.6)
200mm - Generally sharp all around
300mm - center is sharp, corners are not so hazy.
Can be sharper with a higher aperture (f/8)
APS-C
+1 stop of aperture for sharper photos
Distortions
Full frame
Concave and convex effect Visible at 70mm and 300mm
Looks fine at 100mm
Vignetting
Full frame
Visible at f/5.6
Not visible at f/8
APS-C
Not a problem
Chromatic aberration
Not very visible at 200mm
Stabilization
Good
Zoom ring
Not as smooth
Bokeh
Looks nice and soft
LCD window
Live focus distance
Effective focal length on APS-C
Amount of camera shake
Able to switch between black / white when you press and hold
Able to switch off when you press and hold longer
Switches
AF or MF
Image stabilization ON or OFF
Zoom ring LOCK or UNLOCK
Notes
Canon extenders cannot be used with this lens as the glass element is almost flushed onto the rear lens mount. It will show an error.
No weather sealing
Check out the lens on Amazon:
Sources (information)
Photo credit
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