K&F Concept PK K Mount Lens to Sony NEX E-Mount Lens Adapter, Compatible with Sony NEX-3 NEX-3C NEX-3N NEX-5 NEX-5C NEX-5N NEX-5R NEX-5T NEX-6 NEX-7 NEX-F3 NEX-VG10 VG20

I ordered this when I got a new Sony A7c digital camera. I already had a few Pentax lenses from my old film camera. This adapter was as simple and attaching the lens to the camera and it was ready to start taking photos.Now if only my eyes were as sharp as these lenses are capable of being…

Found my dad’s old gear one day and found that this adapter was worth a shot for the price. He doesn’t shoot with a camera anymore but I’ve been using a sony a7c and the 135mm FD lens mounted perfectly to that. I haven’t given the lens a true thorough cleaning, but my dad had it stored in quite a good case so there wasn’t too much to be concerned with aside from a finger print on the lens. I used my bulb blower to avoid loose particles mussing up my sony but I’m unfamiliar with what lens coating the FD may have, so I have’t quite wiped anything around yet. I’ve since noted oil inside but not to a disastrous amount. That being said, the image quality was still sharp in the areas that were focused in on (I’m 110% sure that because I’m a novice and the controls on the vintage lens are different, the slight issues with focus were on me and not the equipment). With a good cleaning I’m sure I could pack in this lens and this adapter with my own regular equipment, and use it as a solid portrait lens option. That adapter is definitely easy enough to install and take off for me to consider it. Do definitely recommend for the price, if you wound up with a lens that you’re curious about. The only thing is, if you’re using a vintage lens for the first time, definitely clean it to the best of your ability before mounting it on your beloved camera! I had no issue and my camera is fine of course but in hindsight I could have been even more careful considering the circumstance… You don’t want any potential fungi spores for sure!

Breathes new life into existing Olympus lenses. Perfectly adequate build quality, especially for price. Easy to swap lenses in and out. It's a mixed bag because the value of many OM primes is that they were so small and because of the necessary flange distance the actual height of the adaptor is nearly as much as the lens itself! Still, though, the resulting package is lighter and easier to use than a lot of native Sony primes, so it's very worthwhile to me. Totally recommend.

I purchase these over time and kept them on the Canon lenses. They fit just right and mate to the Sony body perfectly. No surprises, no disappointments. Great to reuse the vintage lens collection and save a ton of money at the same time.

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.Lastly: I later bought a Fotodiox adapter and a Fotodiox 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 this K&F Concepts adapter and the Fotodiox Pro adapter, where the blades for this Fotodiox adapter are quite thin - which leads me to believe this K&F Concepts adapter (or the Fotodiox Pro adapter) would be the better choices 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 the 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 Ininfity.Again, the blades that engage the adapter to the Sony camera body are the same thickness for the Fotodiox Pro and the K&F Concepts, but are much thinner (for some reason) with the Fotodiox 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 the 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 having the best price, the thick blades similar to the Fotodiox Pro, but weighing 3.5 oz. instead of 3.1 oz. I would avoid the Fotodiox adapter due to its thin blades, where attached to the camera body - they do not inspire confidence. Again, the blades are thicker with the Fotodiox Pro and this K&F Concepts adapter.