White-tailed Deer, Bear Head Lake State Park, Minnesota
I have never been a friend of shooting wildlife with an ISO setting above 250-320. But when you walk out into nature early in the morning or during a day with low light due to overcast, you have to rethink your ideas. The higher the ISO, the lower the resolving power, the more noise in the image, and the lower the dynamic range. But at the other hand, a sharp photo with a higher ISO setting is still better than capturing a blurry picture because shutter speed is too slow as a result of having the ISO settings in the basement. This is in particular true if a very long focal length is employed while handholding the camera. There is a limit where Vibration Reduction or Optical Stabilization, as SIGMA calls it in their lenses, may help you to get a sharp image. The well-disposed viewer of a photo on the web, in a blog post, on Instagram, or any other social site may not see much of a difference, but the real quality bar for a good photograph is the ultimate print.
The photo of this White-tailed Deer, up in Bear Head Lake State Park, Minnesota was shot at ISO 800. To make it clear, it wasn’t a difficult shot. As I wrote here in the blog before, the deer near a campground are not tame, but they are used to people and don’t run away as soon they see a human. Staying in or near a campground is a safety strategy that at least works during the camping season. Their predators, like wolves, avoid these places.
I have shot handheld at 500-600 mm focal length, 1/60 s, ISO 200 or even lower, but I also have deleted a lot of pictures with this kind of settings. Practice is always the key to success for sharp photos but sometimes a higher ISO can save your butt.
Nikon D750, Sigma 150-600mm / f5-6.3 DG OS HSM S, Induro GIT 404XL tripod, Induro GHB2 gimbal head, at 490 mm, 1/320s, f/6.3, ISO800