Testing the Samyang 135mm f2 manual focus is hard. This is using the split screen option in Fuji XT1, yet to test the focus peaking option which is much better option in this DSLM
Will post after successfully master the focus. The DOF is so shallow you will get it soft when you're focusing in the wrong point or the subject is moving back and forth frequently in this case my little daughter.

Hebby Focus xxx.jpg are pictures using Focus Peaking manual focus features. Much better than split screen features... with higher success rate

at 135mm, f2, with stated speed and ISO (set speed and ISO at Auto)