http://www.nikonchat.com/nikon-50mm-nikkor-lens-8d/

What objective should be used in a zoo?
Nikkor 50mm 1.8d or 55-200mm VR, nikon d40x I go to the zoo in Los Angeles.
take the 55-200 VR. you'll appreciate the capture of this condition and sometimes the animal may be at a distance. But hey, why can not you take both and experiment on your same?
nikon 50mm f1.8D