Issue with electronic aperature, XE2s with ttartisan 35mm f1

[Gorgeous xe2s user]

Hi,

A couple of months ago I picked up my first fujifilm camera, the X-E2s. Been using it since then with a manual 25mm focus lens, works perfectly fine.

But recently I've bought a fresh, af lens, the 35mm f/1.8 from ttartisans.

And I've been having issues with it.

Mainly, I've experienced weird problems with aperature control, since the lens has no aperature ring, its controlled electronicly. When setting the aperature control to manual, the aperature blades move randomly when setting a fixed aperature. The lens is often closed on high f value. This problem really ruins the photos when trying to shoot in low light and I'm trying to set aperature to like f/2 but the lens is still stuck at very high aperature (I can see the blades closed) even though I've set it correctly on the camera.

Other times, when shooting in medium to bright light, the aperature keeps changing randomly, even when I set it to manual and to a fixed value. It's almost like breathing.

Also sometimes when I get it to move, it seems that the aperature blades can't open beyond something like f/4. It reaches the opening of f/4 and stays there even when trying to open it more in camera. Of course the values in camera can change, the problem is with the lens aperature blades.

And so my question is, is it normal, it working this way?

This is my first experience with lenses without aperature ring, I don't know about any mechanics that would explain the lens acting this way.

Would really appreciate some feedback, I'm pretty new in photography and I'm just trying yo wrap my head around on how to use this beautiful camera. 😎