What can you do if you need f/22 in order to get a reasonable DOF
at 180 mm and want to use the lowest possible ISO in the dim light
of your zoo's snake exhibition?
Flash would not be a good idea for animal photography at all.
So you have to use long exposure and a tripod.
I kind of expect the night work...but this is a fine example of a long shutter speed during the day. Very good and nice detail throughout....Love that eye...