I am thinking of replacing the D500 with Z50. Questions:. Is Z50 equivalent to D500 in focusing and tracking? (Thinking wildlife here.) I can use the FTZ converter on the Z50 for non-Z lenses: However... How many Z/S lenses are there now for the cropped Z50 sensor? Are there any undesirable effect if one uses full-frame lenses on the Z50? - Is the effect similar or different from using them on D500? How is the Z7 DX-cropped image different from the Z50 image? Due to a recent fire in my house, all my cameras are destroyed and many lenses were destroyed or had smoke damage. I will be replacing a substantial number of camera equipment, or settling for actual cash value on older ones. So I am taking this opportunity to decide what to keep or discard. Thanks in advance. I don't have much time for detailed research on my own at this time as I deal with the insurance claim.