Christopher Frost has a review up on Samyang's diminutive AF 75mm f1.8 lens for Fuji:
Christopher Frost Samyang 75mm f1.8
I also looked at the lens specs on Samyang's website, and this lens has a function called "preset Aperture Control"described thus:
On the Preset Aperture Control function, the aperture blade operates smoothly like a "De-clicked lens", which is advantageous for video recording.
Fujifilm cameras are engineered to control the aperture according to the minimum exposure value(F-stop), so when the camera controls the aperture, it blinks momentarily to set the proper exposure.
AF 75mm F1.8 X intentionally disconnects the communication with the camera body and the lens itself on the Preset Aperture Control function, so it is possible to smoothly adjust the exposure without flickering. ISO and shutter speed are adjusted according to the changed exposure by controlling the aperture, so the exposure value can be changed even with the 1/2 F-stop.
So maybe this lens will be of interest to video shooters to deal with the exposure flicker issue in video mode so often referred to in past DPR threads.
Link to Samyang's product page: