This image of Kodiak with Katmai in the BKGR was created with the handheld 70-200mm f/4 L IS lens (at 70mm) and the EOS-1D MIII. ISO 400. Evaluative metering +1 1/3 stops: 1/640 sec. at f/8.
The only way I am able to make at least a few sharp images from the float plane is to use One-Shot AF and press the shutter button in a continuous motion once focus is achieved.
Don't be shy; all comment welcome.
ps; Just a note to all: you are quite lucky to have Roman as a moderator here. His comments are detailed and made with his love of landscapes fully evident. Though I do not always agree with his tight cropping of birds and wildlife images his efforts here are greatly appreciated. Way to go Roman!