85mm for Wildlife, Nature
Once in awhile someone mentions an 85mm for wildlife, nature photography esp. around sunrise and sunset. For instance Sony has a 85mm f1.8 for $600, while there is the 70-200mm f4 for double that.
If you were going to Grand Teton and Yellowstone would you see a use for such a prime or just impractical vs. a zoom like 70-200 or Sigma adapted 24-105?