K&F CONCEPT M42 to M4/3 Lens Mount Adapter, for M42 Screw Mount Lens to Compatible with Micro 4/3 Four Thirds MFT Mount Cameras

I've used various convertors over the years to fit M42 lenses to digital cameras. This one is the best made I've ever had. It's a great snug fit to the camera and the lens. No play at all in the fitments. The lens works perfectly on my Panasonic G9 - better than on the Sony A99ii which preceded it. Spot on.

I have a quite a few vintage lenses - mostly M42 - but usually buy a new adaptor for each lens I get. I've had a few bad ones in the past but the K&F have always been ok, a bit more expensive than a few others but you get what you pay for, I'm a big fan of K&F stuff, never had a problem with it

As many have said this adapter is beautifully engineered and has a solid no-nonsense feel and weight to it. It has its own plastic clip-lid box. This (together with a Nikon G adapter from the same company) was the second I ordered in two days as I found a M42 lens just after I had ordered the Nikon adapter. They are both superb and literally - if you look at the illustration on the box lid - do what the box says they do. In the case of the older screw in lens attachment takes seconds and the installation is firm and solid. A few words of caution however. Your camera and the lens it has available for it have been designed as a system. Everything is balanced in terms of size and weight - things you considered and appealed to you when you bought it. Adding a lens not designed for your camera will throw all out of balance - literally. In addition lens designed and made decades ago were the best they could be for the price at the time. Their performance was often stellar, sometimes rubbish and usually OK. In some ways these lens can be seen as motor cars from the 1960s. You may admire a classic sports car like an E-type Jaguar or similar. You may have had one at the time and remember how it performed or you may simply want to drive one. But the experience may not be as you remember or imagine. Your beautiful head turning sleek car is probably very uncomfortable by today’s standards. You may not be able to find some where to drive it to the maximum. It may become a ‘Sunny Sunday’ car, only coming out when the weather is perfect and sitting in the garage most of the time. Your old lens may be like that sports car. ‘Good glass’ optimised for film cameras from years ago may be unforgiving on a digital sensor. Modern focusing aids like peak focusing may not always work. Your idea of getting a cool looking cheap super telephoto lens by using an adapter on a 2x crop sensor in practice may result in a ‘monster’ you can use only in certain specific, limited circumstances. And as stated at the top of this review your camera may feel heavy and unbalanced - something to consider, especially if you have small hands or arthritis. But if you have read this far and are prepared to accept that you may not get an award winning photo first time - or indeed ever - simply want to experiment and at the same time improve or recapture your photographic skills and not rely on your modern digital camera doing all the thinking, then your camera, this adapter and that lens in the garage or cupboard or drawer will get along fine. And best of all you will have fun and may even surprise yourself.

Works well, and feels solid and well made. All lines up as it should on the mount, and focuses to infinity (possibly slightly beyond; I may tweak this a little). One thing to note is that there's no stop-down button, just a fixed ring to hold the pin in, so you can't use the preset apreture on most lenses.

Having bought a cheaper version on eBay that didn’t connect properly I gave this one a go as it had good reviews. Completely agree with other reviewers, it provides a secure fitting and is great quality. I’ve gone ahead and bought a second one for a different lens mount which is equally as good. Highly recommend this brand, and the little box is comes in is useful for portability

This adaptor is a great fit on my GH5 for my Helios 44-M. No light leaks, easy to fit, doesn’t come loose when changing the lens. You do have to adjust the ibis (double the focal length, I use 116, so it’s a definite portrait lens) but it gives a new lease of life to a lovely lens. Everything works fine. Well worth it and gives you a great vintage lens in your kit.

A friend gave me an old M42 200 mm lens since hewas unable to make use of it. I bpoght this adapter to see if the lens was still viable. The adapter connects to both the lens and the camera very positively and cleanly. A good sign is that the red focussing mark and the aperture equivalent are top dead centre. The lens is of the early aperture preset type where you set the desired aperture, but the lens remains fully open until you spin the ring adjacent to the aperture ring to close down prior to exposure. Clearly one can either use a meter and set the shutter speed manually or leave the camera meter to set it at the time of exposure. Clearly the exposure time displayed will only be accurate with the lens stopped down. Focus will obviously be manual, but with Olympus bodies you will get image stabilisation if you manually set the focal length. An interesting experience using a lens designed for cameras several generations of development back, pretty well using the same techniques we were using 60 years ago. This adapter feels so well made that it was a pleasure to use it.

This is an excellent little adapter, I have some old M42 lenses that my godmother gave to me along with her old camera many years ago. For the price of this little yoke I now have a whole new set of primes for my GH5. Such a great little product! K&F Concept make great affordable products, I've purchased a few of their items now and will continue to as their products are of a very high quality.

I used this to convert a Takumar 135-200mm on to my G85. I picked up the lens cheap and figured why not? The adpter fit perfectly on both the lens and the camera, picture quality is outstanding and the build is excellent. Since ordering this I've have ordered 3 more of varying sizes and have been more than satisfied.

Exactly as described, works perfectly with my omd-em10 and takumar 55mm f1.8

Le produit arrive rapidement parfaitement emballé, sous de multiples couches de protections. S'adapte parfaitement aux objectifs à vis M42 sur les montures 4/3 ( Blackmagic pour ma part ) Je suis ravi ! Matériel de bonne qualité, bien conçu et matériaux solides. Pas de jeu, ne force pas, très simple et efficace !

L'anello si adatta perfettamente al mio corpo macchina di una Lumix GH5 II e degli obiettivi vintage con attacco M42. La qualità è molto buona, non ci sono ovviamente pin per automatismi. Spedizione celere come sempre

I have a handful of old Pentax lens and wanted to try some out on my Panasonic G7. Had no issues with mounting and everything works great. Tried photos and video and the quality was still there.