[APS-C] The lens is very light but functions well. The dial is particularly smooth and textured when focusing. But the aperture function needs to be improved, the smallest aperture of about 2.0 will not be purple, but further small adjustments will appear purple edge. I don't know how to solve it yet. But 2.0 aperture is also enough to use. Overall very satisfied! The price is very low! Will continue to buy other lenses from them.

[45°] Bought this lens on a whim. Although it's a Micro Four Thirds lens, it covers APS-C size sensors like the Z Cam E2-S6 with a Micro Four Thirds Mount. Crazy to think that this tiny lens can do it.

At $73, it's an absolute steal. The build quality is full metal and although it's semi soft wide open at F/1.4, it looks very cinematic on a modern day 4K or 6K sensor like the BMPCC4K or ZCam S2-E6 Super 35 camera.

[f/1.4] I wasn’t expecting much but actually is pretty good. Nice amorous makes it a breeze to focus on my CL. Even wide opens pretty sharp esp in the center with a little softness. Stopped down to f2.8 it’s really good and contrasts. Only flaw is the hard stop is a little past infinity. Do get a screw in hood though.
A bargain at twice the price and makes me want to look at their other lenses.

[10] Another impressive lens from TT. It's not a shaaaaarp lens, it's a beautiful lens. If you enjoy 3D pop, life-like rendering, deep colors - this is the lens for you and it rivals expensive German glass in that magical look. If shaaaarpness is your only metric of lens performance and you require it to be surgical in 800% far corner zooms, you'll hate it. Stick to that lifeless ART glass.

[FUJIFILM X] A great lens, good pricing, and lightning quick shipping

[Manual Focus] For something this cheap, you'd expect something dummy cheap - however, I can say without a doubt that this lens worth more than what you pay for. The build quality is top notch; the pictures are rendered beautifully. I'm super happy with my purchase and I'm probably gonna end up buying the newly released TTArtisan 23mm f/1.4.

[39 mm (Front)] This lens is great for low light. Just what I was looking for. Great construction quality.

[FUJIFILM X] This is a great lens.
I'm using it on the Canon m200. It is very well-made and compact. This is my favorite manual lens so far. I have plans to order the 50 mm.

[f/1.4] I have a Sony a6500, I decided to do street photography this lenses is very compact, manual focusing is fast and stop clicks are firm. I like the contrast of the lens when I shoot black and white on my digital camera easy to control within the camera, very few corrections needed in Photoshop once you understand how the lens works.
One slight annoyance is when you mount the lens it seems to take a little bit more force then necessary, that's why I returned it for an exchange on the same lens.
Functionability in handling getting to the f-stop in the focusing is very easy, I have relatively normal to small hands which makes it easier for me to control. Finding filters for it took a little while but I have a range of colored filters for contrast and black and white.
According to the information I read you can use infrared filters on the Sony 6500 haven't tried it purchasing two filters to see how well it works if the contrast is good as black and white I should have no problems bringing out the contrast when using a infrared filter.
Sorry for being long-winded but that's my opinion of the lens overall I like it I hope this helps everybody interested in doing black and white and infrared photography.

[f/16] It is an amazing lens. I have been using it as I got it today and it is great in any situation. I personally think it shines in street photography but again it's great for any situation.