According to my AI friend, whom we affectionately refer to as "The Wizard".
- The D850 deserves better glass if you want to take full advantage of its insane sensor.
- The 18-140mm will work, and for casual use it's fine, but it's like putting regular gas in a Ferrari. You’re leaving a lot of performance unused.
- If you just want simplicity and convenience, it’s a fine starter lens.
- If you want to get the absolute jaw-dropping full-frame magic you’re paying for, you’ll eventually want to invest in FX (full-frame) lenses.
So it appears I will soon be sourcing lenses as well . . .