Fujian 35mm f / 1.7 - a lens from surveillance cameras, adapted for use on mirrorless cameras with APS-C matrices or on micre 4/3.
The abbreviation CCTV (Closed-circuit television) appears in the name of the lens, which means CCTV cameras. But the enterprising Chinese sell it on aliexpress $ 20 each (under the Risespray brand).
In order to adapt it to your camera, the kit includes a screw mount for the camera mount. Available for Canon EOS M, Fujifilm X-mount, Sony E-mount (C-NEX), Micro 4/3. I tested this miracle on Sony A6400.
As you can guess, autofocus will not be here. It will need to be twisted with your hands. And this is not easy, because the lens has mediocre sharpness, and the Sony A6400 camera has an equally mediocre screen and controls.
Looks creepy on camera.
About image quality
From a technical point of view, it is disgusting. The lens is not designed for photography. Moreover, it is not designed to work with crop matrices. It covers the APS-C matrix and vignetting is not very noticeable, but there is no sharpness on the sides. What have I to do with it? on both sidesrather than at the corners. He has effective coverage in the area of the 4/3 micra matrix, where the unsharp areas will simply be cut off.
At f5.6, center sharpness is decent. At open f1.7, sharpness is not very noticeable, but there is an interesting bokeh, for the sake of which you can consider buying such a non-standard lens.
Bokeh examples on Fujian 35mm f / 1.7
The good news is that he knows how to spin a boke, like Helios... But at the same time it costs less and has a wider angle relative to most analogs.
The lens also has good macro capabilities, which is facilitated by macro rings included. Macro detail is very weak, but there is BOKE and drawing.
I show examples with bokeshka, tk. to shoot with this lens at infinity is not interesting. You can, but it just doesn't make sense.
For more details about the Fujian 35mm f / 1.7, see my video review:
If you want yourself high-quality lens on Sony A6400, then I advise you to look at one of the autofocus Samyangs.