bought it to use with the many Pentax K-mount lenses (of various generations) that I use on the Pentax KP, including the Sony A7r 2 that I recently added to my kit. The adapter is well made and is made of very solid metal for the structure, for the connector and for the bayonet. The polished metal notched ring seen in the center allows the membrane to be closed between the maximum and minimum of 11 positions without reference. Basically, you can close the aperture of any lens, but you don't know exactly what value it's set to (other than, of course, the two extremes that correspond to the maximum and minimum of the lens mounted). This obviously applies to the most modern optics without their own aperture ring. The rotation of this ring, which basically wants to simulate the membrane ring, is quite fluid and has small shots to facilitate positioning as much as possible. I've used it with various Pentax APS-C lenses, from the old 50M 1.4 to the Sigma 18-35 f/1.8 Art and 17-70 f/2.8-4 C. All work flawlessly, always within the limit , which is imposed on the most modern models of an approximate selection of the membrane. Obviously there are no electrical contacts, so there's no exif data on the optics and the focus is only manual (but the A7R2 is excellent in that regard). It is precisely the need to focus manually and without an electronic connection that prevents the use of some modern lenses, that is, those in which the focus ring does not work mechanically, but through the camera module. For example, the DA 18-50 WR RE, a very versatile and lightweight lens that I personally hold in high esteem, is sadly useless as there is no way to focus. Apart from this limit, which the adapter obviously cannot fix, the product is very valid and allows you to take excellent quality images of optics designed for another brand. In particular, the Sigma Art 18-35 still offers spectacular photos, even if you use the APS-C crop mode (however, with the 42Mpixels of the A7R2 sensor, you can take 18Mpixel photos, which are still valid).

I bought an adapter to connect an old Tamron SP (31A) 200-500mm F5.6 to the Panasonica body. Everything worked, there is no feedback between the lens and between the body and the adapter. Despite the considerable weight of the body and lens, everything remains solid. I haven't noticed any issues with grind or punch through lights. I am very pleased.

Nikkor lens adapter on a Fuji X body, works very well, it's a tight fit and the aperture ring is pretty functional. Obviously, all automatisms have been lost, i.e. only manual fire and manual diaphragm adjustment. For the price it's a great product.

Perfect for using my old lens on my new Pentax!

Used on the Fujifilm X-H1 analog vintage Pentax lens body, perfect one hundred x hundred, fast delivery, seller recommended, Amazon package always spotless

Manual but the work

Article ordered by mistake, but I already use 3 other adapters from this brand with which I am completely satisfied. Firm and easy attachment at the same time, good ergonomics, both lens and body side. With my old membrane-preset lenses, the rotating ring makes it easy to switch from full aperture (for precise focus) to your chosen aperture. Item ordered by mistake as Amazon offers you quantities of adapters that look similar but do not match your specific request for lens and body models. Very easy return procedure, charged 1.99€, the item was refunded once I dropped the package at the post office and ordered the adapter that suits me.

had been looking for an adapter for my old Praktikar lens for a long time, but either there was nothing on the market or the products had lousy reviews that made me worried about the lens. The shipping came from overseas and was estimated with significantly longer waiting time than it was in the end. The adapter was there within a week. It was packaged well and appears to be of good quality. I immediately put the adapter on my lens (a 50mm 1.8 Carl Zeiss Jena). When I put it on, I had to apply some pressure to push the leaf spring down. The lens then snapped into place reliably and could be placed on the body without any problems. It was also easy to remove, so that the lens can now be carried in the backpack as standard and I can use the slightly different bokeh for gimmicks :) UPDATE: From a purely mechanical point of view, a corresponding lens can be attached to the Canon 5D Mark 3 with the adapter, but the Spiegel offends, so that there is an error message in the body. Whether this applies to full format in general or whether it depends on the lens, I cannot say due to the lack of test objects. In any case, the adapter for my Carl Zeiss Jena 50mm 1.8 does not work on the 5DMIII... Too bad.