I use mine mostly with a Sigma 100-400, works fine, also with a16-85.
I also use it with a few AF lenses (mf only), and a Voigtlander 40mm SLII, gives me semi auto diaphragm ( focus etc at full aperture,stops down to set aperture with half press of shutter reoease)
Used on Xt3 and Xt5
Gerry