How to shoot on a cloudy day.
This image was shot and then cropped tight to eliminate the cloudy gray background. 1/800 of a second, f/5.6 at ISO 1600. Created using the Canon 5D Mark III and a 600 mm lens. I used the 5D Mark III because there is less digital or luminance noise at 1600 ISO.
The cormorant image was created with the 5D Mark III as well at ISO 800 at 1/400 of a second at f/5.6. Shooting at 1/400 of a second is a slow shutter speed for a 600 mm lens so I pressed my hand down over the center of the lens to dampen any vibration. This is often refered to as long-lens shooting technique.
I used the Canon 7D Mark II while shooting the sea lions, at ISO 400, this allowed me to move around them and get a nice background, without any other people in the image. There were a few people who got a little too close and the sea lions let them know. It's nice to have a 100 to 400 mm zoom on a APS sensor camera with the extra reach of the conversion factor, so staying back and not pressuring the sea lion was possible.
Again it ws a day to shoot tight, and the soft difused light made for some fine detail in the images.
Enjoy Thanks Tim