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 have used manual lenses from 7artisans and old m42 film lenses, I have to admit, this is a little harder! Not through the fault of the adapter bar the fact I wish it had a tripod bracket - the weight balance is pretty scary on a large macro lens. Build is pretty nice. The image quality is good and it's great that you can stop then lens down with this adapter. Only problem is, and not the adapters fault it's a technical limitations, you cannot see and tell what aperture your at, you have to guess. It's frankly a bit of a painful wind up to use, but if your not looking for fun and just want the performance of some amazing Nikon glass you used to love, that is enough. I think it's good value, and if your going to adapt a Nikon lens this is the best performance to value, you can get amazing photos with a lot of effort and patience. If you don't own Nikon lenses yet, go down the K&F m42 adapter route it's much more fun. I wanted to use a sigma 70mm and despite the technical caveats I think it was worth the price to keep that lens in action

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.

This adapter came well packaged and presented. Overall build quality appeared to be good. The adapter was a secure fit to a Panasonic Lumix. The lens and adapter functioned well in use. However the fit to an Olympus Lens was really tight and this concerned me. I note other reviewers have mentioned this problem. I bought the adapter for its perceived quality over cheaper adapters. I am not confident in frequently fitting and removing the lens from the adapter.

For the price this is a very well made bit of kit. I am giving it 5 stars because of the build quality and price. Nikon fit lenses do fit very well indeed but the M43 fit is very tight. But having said that, it means the lens is very secure with no play at all. If you use this on a lens with no f-stop ring then its all guess work - though you can still set the shutter speed and ISO. The ring on the adapter just lightens or darkens the EVF on an Olympus EM1 mark II. But it is a DUMB adapter, with no communication between the lens and camera, so it does exactly what I expected. I wanted to use my Nikon fit Sigma 180mm f2.8 OS macro lens on my EM1 mark II when looking to replace my Nikon system. It did work and I obtained good, detailed images of a bumble bee in flight. But, there are better macro options for my Olympus system and I wil not be using the adapter again. I did try it out on my Nikkor 200 - 500mm f5.6 on my EM1.2 but felt the images appeared somewhat soft.

I am extremely impressed with the quality of these adapters. I have 5 now, and while they might be a couple of pound more expensive than some others found on ebay, when you hold them in your hand, you know you're getting good value. They are all precision machined metal, with high quality finishes, and the control rings on adapters that have them, have a very satisfying action to them.For dumb adapters (ones without electrical contacts for modern lenses), getting anything more expensive than these adapters is a waste of money. They do everything you need and couldn't possibly feel more sturdy or satisfying to use in my opinion.Note: if you want an adapter for a nikon ai lens, the nikon G adapter also works, the aperture ring just doesn't do anything. I use the one adapter for both ai and g lenses.