ZHONG YI OPTICS Mitakon Zhongyi Minolta MD Mount Lens to Micro 4/3 Camera Turbo Mark II Adapter

I'm pretty impressed with the Lens Turbo II, especially considering the price. Mine is Minolta SR/MD to MFT. Tolerances seem fine, not looseness between the lens and adapter or adapter to body. Image quality holds up well, not as big of a quality hit as I was expecting. Compared to my Viltrox adapter at twice the price, this holds up amazingly well.

I've been using this adapter to pair Minolta lenses with an Olympus PEN E-PL8. I tested it with the MC 50mm 1.7, MD 45mm 2.0 (love!), MD 35-70mm 3.5, MC 28mm 2.8, and MD 200mm 4.0 (love!). The old lenses are a bit large on the little digital camera, but totally within reason, not ridiculous. The photos are GREAT! Any Minolta lens from the 1970s is way better than the crummy kit zoom f/3.5-5.6 plastic thing that came with this camera. The only problem I've had in the image quality of the end photos is glare with backlighting: under certain conditions with sun in the background or a lightbulb overhead, I've gotten some mad glare blasting out the contrast in the center of the shot. It goes away if you can block the light from side-glancing the lens either with a hood or holding out my hat. I don't have this problem using the same lenses with a straight tube adapter, or on my Minolta SRT 201, so I know that the glare is introduced by the addition of the adapter, and it is not due to the lens by itself. By far my most-used lens with this adapter is the 45mm f/2, which becomes the ff equivalent of about 60mm and maybe f/1.5ish? I don't understand the math on the fstops but I know it does low light fantastically and I think you gain maybe two thirds of a stop of light? It makes sense, since you're putting this massive full frame lens on and concentrating it down to a nearly half frame sensor. Oh, the Minolta 200mm f/4 is so bright and wonderful with this adapter! And the 28mm f/2.8 becomes somewhere near a 40mm ff equivalent I think? A REALLY useful focal length though the 28mm lens itself is a bit large and heavy.I get major vignetting with wide open apertures with the MFT camera set at the native 4:3 aspect ratio. The vignetting gets cut out pretty effectively if you crop the aspect ratio to 3:2. I have a MySet mode on the Olympus set up for this adapter and one of the things it includes is the 3:2 aspect ratio, which is the same aspect ratio of the 35mm cameras these lenses were made for btw.One major quality control problem: the position of the center tube of lens elements *can* be adjusted, and in my case it needed to be adjusted, because the focus ring distance markings on lenses were way off. My 45mm MD lens reached infinity focus well below the 10m mark on the focus ring. So, I unscrewed the little sideways screw on the back camera-side mount, freed up the center element and moved it in the lens-ward direction, and put the screw back in. NOTE: you NEED for the screw to be in place before you mount this adapter. The screw doubles as a stop for the Minolta mounting system. Even worse, messing with this little screw *stripped the threads* in the lens mount that the screw was supposed to sit in. This is one of the downsides of making this junk out of aluminum. Anyway, since I rotated in the element so far lens-ward in order to get my infinity focus at the right spot on the ring, this mounting screw didn't push in place properly anyway, it slipped sideways behind the inside lens mounting. Luckily this created enough tension to hold everything in place and it doesn't wobble. If that hadn't worked, I would have had to get out some glue or something. So, I got this adapter adjusted *near* to perfect, but it took some sloppy "good enough" DIY repair work. Do at your own risk. While this adapter can be adjusted as I described, my experience leads me to believe that it is not meant to be adjustible and it would have been advisable for me to have left it the way it was. I've found it to be true that almost all, if not all, cheap Chinese lens products made for micro four thirds are *actually* designed for APS-C, like Sony NEX or something like that, and the version they make for MFT is kind-of an afterthought with a different mounting bracket slapped on; they never adjust the optics properly to get the right distances for MFT. I think their reasoning is that as long as the focus ring can go past infinity, then that's fine. Well, I want my vintage lenses to work properly and stop right on infinity in perfect focus! That's how they're supposed to work.