Test Chart - Front View

Test Chart - Angle View

Test Chart - Side View

70-200/2.8L @ 200mm/f2.8

50/1.4 @ 50mm/f1.4

24-70L @ 70mm/f2.8

70-200@200mm f/2.8
Poon's original test chart
Slight backfocus

70-200@200mm f/2.8
Poon's improved chart before cutting
Still slight BF

70-200@200mm f/2.8
Poon's improved chart with cutout target line
Perfect results

70-200@200mm f/2.8
My test chart re-tested today
Near perfect results

24-70L @ 70mm/2.8
Distance to target about 3 feet. Focus point on middle jar.
Note that there is more DOF to the rear which is to be expected.

24-70L @ 70mm/2.8
Distance to target about 2.5 feet; focus point on center jar.
The DOF decreases as the target gets closer but there is still more DOF to the rear.

24-70L at 70mm/2.8
Distance to target about 2 feet; focus point on center jar.
DOF has decreased further so that center jar is the only one in focus.

24-70L at 51mm/2.8
Distance to target about 2 feet; focus point on center jar.
Same result as at 70mm, center jar is in focus with more DOF to rear.

24-70L at 24mm/2.8
Distance to target about 2 feet; focus point on center jar.
Similar result; center jar is at best focus but DOF appears balanced.