FotodioxPK-NEX Lens Mount Adapter Compatible with Pentax K Lenses on Sony E-Mount Cameras

Used this to attach my grandpa's Canon 50mm F1.4 to a Sony A7iii. The image is softer than a newer lens but has a smooth filmy look. Love it!

Here are my observations for these adapters:1) All of my Zuiko lenses are sitting too far from the sensor - Infinity focus happens when their distance scales are at about 7 meters. This is not really an issue when manual focusing, but I can't rely on a lens barrel's Infinity stop. It's a good thing the Sony a6000 has Focus Peaking and Ficus Magnification - they are absolutely necessary for manual focusing at Infinity using these adapters.2) All of my Zuiko lenses can be focused more closely than on an OM body. This somewhat compensates the Infinity-focus problem. :-)3) All of my vintage zoom lenses lack the resolution that can be captured by the Sony a6000 24MP sensor. They are just soft, even in the center at f/8, even though they were mire than acceptable with film.4) Only five of my Zuiko primes are up to the task: 50mm f/1.8, 50mm f/3.5 Macro, 55mm f/1.2, 200mm f/4 and 300mm f/4.5. The rest are too soft, wide open, but ridiculously better at f8. The 50mm f/3.5 Macro and the 200mm f/4 are spectacular with the Sony a6000 (at 77mm and 308mm equivalents).5) The OM to E-mount adapter exacts about a 1/2-stop loss of speed from the vintage lenses, much as would any extension tube. It's not a problem, thanks to good high-ISO performance.6) Many lenses made for digital sensors are designed to deliver the light as perpendicularly as possible - to avoid the CA (chromatic aberration) "purple fringing" seen with lenses that were designed for film. I'm getting a lot of CA in the corners of the frame, but it's easily fixed in Photoshop. Note: There's no CA by shooting at f/8 instead of wide open.I bought this Fotodiox Pro adapter after first buying and testing the K&F Concepts adapter and the Fotodiox (not Pro) adapter - for comparison and find them to be essentially identical in quality and function, so far, except the blades that engage the adapter to the camera body are about twice as thick with the K&F Concepts adapter and this Fotodiox Pro adapter, where the blades for the Fotodiox (not Pro) adapter are quite thin - which leads me to believe the K&F Concepts adapter (or this Fotodiox Pro adapter) would be the better choice when mounting a heavy lens (or perhaps any lens). Otherwise, the most significant difference is their weights. The aluminum and brass K&F Concepts adapter weighs 3.5 oz. The aluminum Fotodiox adapter weighs 3.2 oz. and this Fotodiox Pro weighs 3.1 oz. See photos...All three adapters have a length of 33mm, from the body mount to the lens mount, and again, they all focus well short of Infinity.Again, the blades that engage the adapter to the Sony camera body are the same thickness for this Fotodiox Pro and the K&F Concepts, but are much thinner (for some reason) with the Fotodiox (not Pro) adapter. Oddly, they all feel the same when attaching lenses or when attaching to the camera body.If I had to do it all over again and money were no object, I would get this Fotodiox Pro, due to its being the lightest of the three at 3.1 oz. vs. 3.2 and 3.5 oz and having thick blades, rather than skinny blades. But the K&F Concepts comes out on top for the price conscious, with thick blades similar to this Fotodiox Pro, but weighing 3.5 oz. instead of 3.1 oz. I would avoid the Fotodiox (not Pro) adapter due to its thin blades, where attached to the camera body - they do not inspire confidence. Again, the blades are thicker with this Fotodiox Pro and the K&F Concepts adapter.

With new Sony lenses being very expensive, it makes sense to use my old Minolta lenses. The adapter itself works perfectly. It attaches the Minolta lens to your Sony E-Mount camera. The rest is up to you, the photographer. The a7iii has an assisted manual mode, with focus peaking, and focus magnification. It took me about a day (and a few websites and youtube videos) to get really comfortable. Now, I feel very comfortable, and have taken some nice pictures.Now I can keep using my old Minolta glass, add a couple of additional "vintage" lenses, and get a really high quality emount if I want. The shot accompanying this review is with my a7iii, the fotodiox adapter and a 21 year old Minolta AF 35-70 kit lens.

Phenomenal, if you understand what it's for. I see a lot of reviews with complaints that you can't use autofocus or adjust aperture with this adapter. Really? How could you have thought it would do this? It's true that lenses you use with this will cause significant vignetting. All you have to do is think about it - you're using a M43 lens on a larger sensor. Of course it will vignette. I use this with my 7.5mm Rokinon lens for virtual tours. It means I only have to take 4 photos instead of 6 on a M43 camera. It solves all sorts of problems for me. The adapter just stays on the lens, so no complaints. Seems sturdy, too. Highly recommended.

After reading some of the other reviews, I was a bit reluctant to order this, but I am glad I did. I am very fussy on product quality, and this adapter exceeded my expectations. It is very well-made, from brass and stainless steel. It fits on my NEX-6 with a nice, solid feel - just like attaching a Sony lens. Same with attaching a Nikkor lens to the front. I've had no issues with lenses or the adapter being too tight and sticking or with it being too loose. The blue aperture ring has been updated, and now has 6 click stops. It rotates with a smooth, precise feel. Mine does not pull-apart like another reviewer's adapter did.I purchased this adapter so that I could use my Nikkor AI-S prime lenses from an old Nikon film camera. So far, it is working great, and photos taken with the Nikkor lenses look fantastic.It comes with no instructions, so here's how to use it, after attaching your Nikkor lens:1) Set your NEX camera to "A" or aperture priority.2) If your Nikkor lens has an aperture ring (older manual focus Nikkors), rotate the adapter's blue ring to the far right / smallest aperture setting. Now rotate the Nikkor lens aperture ring to the desired f-stop. The NEX will select the shutter speed needed to get the correct exposure.3) If you're using a newer autofocus Nikkor "G" lens from a current Nikon DX digital camera, just rotate the blue ring to the desired f-stop - wide-open to the left, stopped-down to the right. The NEX will pick the shutter speed.4) If you prefer, you can also set your NEX to "M" or Manual exposure, where you choose both the shutter speed and f-stop.5) Remember, your autofocus lens will not autofocus with this adapter, so move the button on the side of your Nikkor lens from "A" (autofocus) to "M" (manual) and focus the old-fashioned way by manually turning the focus ring on the front of your lens. If you turn on "Peaking Focus" in your NEX setup menu, it will tell you when an object is in focus by forming a colored "halo" around the object. You can choose a yellow, red or white halo from the NEX menu.None of these lens adapters have any glass or optics. There are other brands that sell for hundreds of dollars, but I can't think of how they could possibly perform any better than this inexpensive adapter.