I happened apon this mother and her cub. I stayed and watched for well over an hour. Eventually I switched to the 400mm lens. It's too bad I didn't have room to pack the 600
197I3273.jpg 2007:06:22 11:29:27 Focal length: 300.0 mm Lens: 28.0 to 300.0 mm 1/400 sec, f/7.1 Mode: Program ISO: 200 AF mode: One-shot AF White balance: Auto Flash: Off File size: 796KB Image size: 1500 x 1000