Pentax P645 120/4 Macro on Fotodiox Pro TLT ROKR Lens Adapter for GFX, wide open or at f/5.6.
I’ve had this lens and adapter for a while, but didn’t have a good initial experience and never used it.
Finally decided to give it another chance, and it’s much better now. The first image was on a tripod, and focusing on the eyes was relatively easy. The second image was handheld — it can get you close, but it’s not worth it. You have to be very precise to get it right. This is a full tilt (10 degrees?). I don’t like this look much; I’ll have to play with different angles to make it more pleasing to my eyes.