We have done a simple AF tracking test on the Fringer NF-FX (Nikon F to Fujifilm X adapter) prototype. Nikon AF-S 200-500/5.6E VR lens works very well on Fujifilm X-T3 (latest firmware 4.0).
![broken image](http://custom-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,fl_lossy,h_9000,w_1200,f_auto,q_auto/975448/295826_501194.jpeg)
Please watch the test video:
Fringer NF-FX will be released soon. Thank you!