« on: January 20, 2014, 07:49:49 AM »
Helpful, but the two things I really wanted to know weren't answered: How effective the VC is while panning, and how much it improves at 600mm when you stop down to f/7.1 and f/8.
Whatever that is, it triggered AVG for a web-based exploit.
What does the chart represent? sharpness?
If I understand it correctly, it's your typical Imatest result like on Photozone. The ordinate is LW/PH.
I can't tell if it's center and edges, or center and corners, or center and average. But they go on pretty close, so it doesn't really matter. It's just good
I think they used a 5D MK III. As an approximation based on other available imatest data, 600mm f/8 is very, very close to the 100-400 L at 400mm f/5.6. Only very slightly worse, if you consider the error margin.
I see ... thanks
The dark blue is horizontal resolution and the light blue is vertical resolution base on the test chart (red box scale area).
Have a nice day.