Thanks, everyone. For those who may be interested, these were all shot with a Nikon D300, a Sigma 70-200 2.8 OS, and a Sigma 1.4X TC. Sometimes, the whales were too close for that lens setup. I brought my Sigma 50-500 OS, but it never came out of the case. I suppose focal length would have been better, but hand holding that sucker would have cost me way too many images. That lens is for tripod use, only.