Works exactly as expected.

I use this on my APS-C Camera. Sony ZVe10 w/ Sigma 16mm f1.4

Perfect for getting that optimum shutter speed in the brightest of sunshine - no issues here at all. Just mount and twist.
Also, if you want to get a longer exposure during the day, you can put this guy on to get some dope water fall effects.

Love how simple and effective it is honestly.

I use this with the Sigma 16mm lens on a Sony A6400 for recording videos and it works well to increase the ISO above 100 when the aperture is low and the shutter is at 1/60.

There are threads on the outside. I have the 67mm filter and the outside threads are 72mm. It took me a bit of trial and error to figure this out and would be nice if that was printed on the filter somewhere.

The adapter allows the use of AF or MF Minolta/Sony A lenses on Sony FE mirrorless cameras. Very well done. The lens can only be used with manual focus, but is fine in most cases. There is an aperture slider that isn't marked with f-numbers but with click stops so you can count stops if needed. It serves its purpose and allows me to do some vintage reviews of Minolta SLR lenses.

I have had the same experience with the M42-Nex adapter.

don't normally give 5 stars in these reviews but this lens almost made my old Nex 3 feel like a new camera. For taking pictures of people, it's head and shoulders above any other NEX lens I've tried (this is my fourth lens). Essentially, the f1.8 aperture lets in so much light that the camera (along with image stabilization) can use faster shutter speeds to get a specific shot, which means a lot less blur and, in practice, beautifully sharp images. The f1.8 aperture also defocuses the background of the shots, making for simpler compositions that emphasize the main subjects in the frame. Also unlike many fast Primes, this pen is sharp down to F1.8. Of course, the 75mm equivalent focal length makes this a single-purpose lens, but don't let that put you off - it's a purpose that most people will need plenty of, and there's nothing wrong with doing one thing well. Here is a real example: Last year I went to a wedding. A nice occasion but the ceremony was indoors and it was a dull gray day. I used the stock zoom lens that came with the Nex (the 18-55mm) and none of my images came out all day; they were all blurry because people were moving too fast and I couldn't react in time to catch fleeting moments and that was because the zoom lens can only do about f5 at its 55mm zoom end and in any case it is on this one Focal length not very sharp. Last weekend we celebrated my little son's christening. A nice occasion but the ceremony was indoors and it was a dull gray day. I used this lens and every single one of my photos came out perfect - beautiful. No need for flash, no need for high ISO. I was even happy to set the camera to the default settings and let my friends take photos for me because I trusted the lens to get a good picture. I've never done that before! One thing I've found is that I have to go a step further backwards than I'm used to because the lens can't focus close-up. You must be a few feet away from your subject. In every other respect, this is the best money I've invested in photography since buying the camera. I was nervous about buying this as it's more expensive than the entry-level lenses in the Nex range. It turns out there's a very good reason for the difference - it just has a much better "success rate" for getting the right photo first time than any other lens I've used; it complements the money I originally invested in the Nex camera and adds another dimension it didn't have before.

use the lens on my a6000. Processing and haptics are really good. At f/1.8 it's a little soft. As soon as you stop down a little, the sharpness increases and leaves almost nothing to be desired. However, I have to say that in terms of sharpness, it doesn't come close to the Sigma 60mm 2.8. I had ordered the Sony to have more light intensity with 1.8 and to be able to use the OIS. But since I have to stop down to 2.8 to get really sharp photos, the only advantage the Sony has over the Sigma is the stabilizer. If you can do without the stability and the light intensity of the Sony, I recommend the Sigma. Especially since it's cheaper too!

Bought for a Sigma Art Sony 24-70 and the Sony 28-135 (with Step Down), it is now permanently on my lenses. Additionally, having an ND and a polarizer on the same filter is a really nice surprise, especially at this diameter. For video recording and holding at 1/50 or 1/100 in broad daylight, this is best. A highly recommended essential.

Analogue lenses have character and charm - that's for sure. And they are often many times cheaper than their digital counterparts. So why not adapt the good "old glasses" to a new camera? I already own the Neewer adapter for my Minolta glasses and now I wanted to test this K&F lens adapter for my M42 lenses on my Sony a7III and a6300. Today I also added the Minolta(AF)-NEX adapter to continue using my old Sony A-mount lenses.

I placed particular value on the following two points: quality and function.
1. Quality:
At this price (Minolta AF or Sony A-Mount), you can expect a little more from a lens adapter. To get straight to the point - my expectations were fully met.
Packaging:
The adapter arrived very well packaged and, in contrast to the Neewer adapter, even has a resealable plastic box. In this you can transport or stow it very well when you don't need it. Because we definitely don't want too much dust getting into the adapter and then into the camera.
Adapter:
The K&F adapter is made entirely of metal (brass and aluminum + a few steel screws). It feels very high quality and you have the feeling of holding something solid in your hand. The thread is very clean and well made. My lenses could be screwed in and unscrewed again without jamming. That's the way it has to be!
The fit on my Sony a7III with E-mount connection was very snug and tight. There was no wobbling or sliding after the adapter snapped onto the camera. It was also easy to dismantle thanks to the grooves on the surface of the adapter. This was thought through and not just valued for the optics.
The aperture selection on the Minolta AF adapter works excellently and feels "full" and easy to use. The f-stops therefore sit correctly and are not accidentally adjusted.
2nd function:
The adapter actually only adjusts the back focus of the "old lenses" to the new camera. He does this job excellently! Focusing to infinity works perfectly and the images are not affected by any additional lenses. Of course it depends on the lenses what the end result looks like - in my case I have the Porst wide angle 35mm f/3.5, the Auto Exaktar 135mm f/2.8 and for the Minolta AF the Samyang 16mm T2.2 used (see sample images).
I'm really happy with the K&F adapter and I'm sure I'll still have a lot of fun with it and my old lenses. I would buy it again anytime.

Edit 03/04/2019: I've even bought the Minolta(AF)-NEX adapter because I've only had good experiences with the products from K&F so far and I wasn't disappointed this time either. Great product and thanks to the choice of aperture I can now continue to use my old Sony A-mount lenses.

I bought and paid for the K&F adapter as usual via Amazon, but I get the money refunded as a product tester. As always, my opinion remains independent and honest.

John from Photoscrubs