With the current 100-400L model, what is the minimum shutter speed you need at 400mm with IS to get a decent keep rate for your picture? I assume it would be less then 1/400. Maybe 1/200 with the current IS? Any thoughts as to how much of an improvement a new IS version would make using these parameters?
I was always afraid that at 400mm and f5.6, even with IS it must not be always obvious to get great shot on a cloundy day?
I've used mine hand held at 1/25 sec out my back window. contrast was poor, but the image was usable, even if not in the excellent range. It amazed me that it did so well at such a slow shutter speed.
I saw our baby goats pllaying king of the mountain on our horse, and the camera had my 100-400 on it, so I just took the image less than a second before the horse rolled. No time to properly set up for the shot.
1/25sec, f/11, ISO 800. Obviously, if I had time, I'd have set a wide aperture, faster ISO, and had a faster shutter.
The other day, our young baby goats ambushed the horse as he walked by their 3 ft high house where they were playing, and one jumped on his back while he was standing by them. He immediately started walking so no chance to get the camera. The horse loves his goats, and they love him.