John O. wrote:
Many professional photographers switched to APSC from 35mm sensors because of the crop factor and how it enhances those long wildlife shots. I use full frame lenses on my APSC size sensor camera upon occasion. I would not switch back to full frame because of the high resolution with today's sensors. If I want wide angle, I use my separate wide angle 10-22mm zoom lens. Plus, APS size lenses are lighter and less costly than full frame lenses.
But there are no long prime APS-C lenses.