I own a Sony A7ii , can i use your lens ？
Full frame lenses will be completely compatible with both full frame and APS-C size sensor cameras within the same mount. You would not lose sharpness by using a full frame lens on an APS-C size sensor camera. You would be using the sweet spot of the lens, so won’t experience the downgrade in quality that can occur with certain lenses as they get close to the edge. The limitations you can experience with a full frame lens on a smaller sensor body would occur when looking for a super wide angle lens or an all-in-one, where the range might not be all that wide or suitable for an APS-C size sensor cameras.