MFT Lens Mount Adapter for Canon EF/EF-S Lens to Panasonic and Olympus Micro M4/3 Cameras

Used this to breathe new life into some old Canon glass that was otherwise retired when I switched systems. This adapter worked nicely with the Panasonic GH6. Used it with an EFS 10-22 and a 70-300 DO-IS and they seemed to work as well (speed, focus, clarity) on the Panasonic as they did on the original Canon bodies. Not as fast to focus as Panasonic Leica equivalents, but perfectly fine (those lenses weren't overly quick to focus on the Canon bodies either.) Also used it with a TC on the 70-300, and the GH6 had no trouble focusing, even at f/8 equivalent. For a hundred bucks, definitely satisfied!

This is my initial review so I will make it short and simple. I have recently bought Sigma 150-600mm C and decided to give this a shot with my old Olympus E-M10. Guess what? It works!AF is good to great in ample light and ok in low-light. AF is fast and accurate most of the time but will do hunting occassionally when there is not much contrast between subject and background or when subject is behind something like many tree branches etc. This thing works on CDAF only, no PDAF. Build and quality are good and can carry heavy lenses. For the price, I cannot complain with minor issues.I have set my expectation low in hope to just enable AF at least 75% rather than me doing it manually.Findings:- Continuous AF and Tracking are disabled and only S/AF/MF work both in still and videos at least with my setup so results mau vary depending on the body and lenses you will use. Not a deal breaker for me as I can still adjust the focus manually when needed.I will update this review with pictures and videos as days go by and will try in other scenarios like BIF etc.

This gadget allows use of EF and EFs lenses on MFT cameras preserving AF and auto iris as well as EXIF data. Focuses fast or at least as fast as on any EF camera. So far I'm well pleased with it.

I will get this out of the way first. This adapter usually provides good auto focus and transmits EXIF information for Canon EF and EF-S mount lenses, aftermarket, and OEM, as long as the lens is compatible. There are exceptions. This is not to say the lens autofocus is always fast. But autofocus is not always fast on an OEM lens.The short review would be is that this adapter works well. I have not used other AF adapters on the m4/3 cameras, but I have used several on Sony E series cameras. The detail of the review is about the operation of several lenses using this adapter on two different Olympus bodies.Note that lens IS will not work with this adapter, and shouldn't be expected to operate as the systems are not compatible. Also, image sensor IS is a superior method over moving lens elements around. This is whether it is the Pentax, Minolta (and later Sony), or Olympus systems. In critical use, such as very large enlargements, the flaws of lens based IS show up. I have also found that lens based IS is fairly useless at the higher shutter speeds needed with fast moving and twitchy subjects, such as birds in flight.I also noticed differences in the AF performance between the camera bodies. In general, it appears that the OM10 Mark II actually provided better performance with certain slow glass (f5.6) at low EV levels (0.5-3) than the OMD-M1 Mark II. I am making a supposition that this may be because the M10 series is expected to be used with slow, less expensive glass, and therefore the AF system is designed to function with f5.6 lenses. This does not always mean it is better with faster F2-F2.8 glass. More details below with the lens combinations I tested.Note also that the adapter appears to work well. However, how well your model of camera body may make a big difference as the AF system in the camera may not function the same with a particular lens.The first set of observations were using the lenses on targets from close to minimum focus and various targets out to about 12 feet at EV 0.5 to EV 2.5 to test low light performance. Focus in bright light was usually error free, unless noted.Canon 135mm F2 complete with the Canon 1.4x EF extender - If you have this lens, it it is really worth using with this adapter. This is probably still the best 135mm F2 made. (The latest Nikon version is close though) This is an length of optic that Canon has been particularly known for. I have a notorious 1950's Canon 135 f3.5 Serenar that I sometimes use on my Sony A7R Mark II, and a NEX 7, and it is even razor sharp. That lens had a horrible reputation on rangefinder bodies for a good reason. 135mm is difficult for the focusing cams to focus accurately and that 135 may not have had the best cams. The situation on mirrorless is different using the critical focusing via magnification.As to the 135mm F2. I tested this with the Canon 1.4x extender because I use it in that combination on my Canon cameras often, and I wanted to make things more difficult in the test.135 F2 with 1.4x on OMD-M1Mark II - This combination could still achieve good AF lock at around EV 2 on a low contrast subject. On a dim subject of 0 EV with low EV contrast, that is, the bright areas are white in dim 0 EV light with dark lines to achieve AF, the combination could still focus, though slowly. That is with an exposure at 100 ISO of 30 seconds at F5.6. With just the 135mm it could acquire a quick (under 1 second from grossly out of focus) focus lock at as low at the same 0 EV level. This equaled the performance of the Oly 60mm macro on the same subject and condition. This is a creditable performance. I did find that the 60mm macro was capable of -1 EV (60 seconds / f5.6 ISO 100) with a quick focus on similar subjects.As another comparison, the Panasonic Leica 100-400mm (an excellent optic) could achieve a similar quick and accurate focus at EV 0, but had even more difficultly than the 135mm with the 1.4x extender, completely failing to focus.What this means is that you should be able to achieve good AF on darker scene that has more contrast from even dim points of light, such as city lights.Focus at more normal EV levels was snappy, close to what the native and shorter 60mm macro achieves. It also focused as well as the Panasonic Leica 100-400mm on the daylight scenes I shot, including of moving objects and flying birds.The Canon 135mm F2 combinations on the OMD-M10 Mark II were very similar in performance, albeit with sometimes a bit more hunting in the dim 0 to -1 EV.This is a good time to mention the results with the Canon 400mm f5.6. This was not a good match with either body. It did better on the M1 Mark II, but I would only recommend it for slow moving or stationary subjects. It might work for subjects such as focusing on a race car, but an athlete in motion would be likely be a bit frustrating, particularly compared the the performance of the Panasonic Leica 100-400. The performance on the OMD M10 Mark II is worse in AF as it could not always achieve a sharp focus on small subjects, such as a bird. However, the resolution and AF performance was great on contrasty subjects such as the moon at night or the sun.90mm Tamron f2.8 SP 1:1 Macro - External focus design. This lens has the advantage of having a push-pull ring for AF to manual focus with a clutch and is NOT fly by wire in manual focus. This provides a positive engagement for manual focus. The focus beep worked on both cameras. A disadvantage to using this lens is that it extends to close focus 1:1 when the camera is turned on if in full range. While it may focus on a subject as it cycles back toward infinity, but don't count on it. This is reduced if the lens limit switch is in the limit position on startup. It is best to use the clutch to initially bring the lens closer to the focus range if the limit switch is set to full.Tamron 90mm macro on OMD-M1 Mark II low light results - Hunts some but locks fairly quick in very low light of down to 1 EV. 0 EV on same subjects as the 135 F2 or native lenses mentioned is sketchy at best with a lot of hunting, even if an AF lock is achieved.At 2.5 EV and above, this lens makes noise but does focus almost as fast as the native Olympus 60mm F2.8 macro. Ahh, if only you could make use of in body Focus Stacking. AF focus is true, and sharp. Works well with the in body image stabilization. AF focus is snappy in bright light, even with fairly low contrast. This one works almost as well as a native fast lens.OMD-M10 Mark II - The performance of this kit is a bit of a mixed bag. It can focus well, but is also subject to missing focus. It doesn't AF well at below 1EV. I couldn't get an AF lock where the M1 Mark II was still able to get an AF lock with hunting.At EV levels above around 2.5, it will lock most of the time. Curiously, if it does miss, you can usually get sharp AF just by adjusting the focus away from the point with the manual focus ring and pushing the ring back to AF. It will then usually focus properly. This combination does not handle EV below 1.5 nearly as well as the M1 Mark II, sometimes just refusing to focus. I don't think this is a fault of the adapter, just limits of the OMD-M10 Mark II AF system.More troubling is that the combination sometimes failed to focus on distant objects with excellent contrast. This did not happen when used on the OMD M1 Mark II.Canon 50mm f1.8 EF - To my disappointment, this lens did not work on either body. No image showed up. The screen was black and no f number showed in the info panel. This lens works perfectly on all my Canon DSLR bodies. I have no idea why, but given the fact that all the other Canon mount lenses fully operate properly with all EXIF data and AF operation (except any in the lens IS, which is not expected).Canon 18-55mm f3.5-f5.6 APSC kit lens. This one is a nice surprise as this cheap lens operates even better on the OMD-M10 Mark II than it does on the M1 Mark II in low light. Up to about 35mm it will AF focus lock in the situations above down to EV 0 on the M10 Mark II. On the OMD M1 Mark II, it would not lock below 1 EV at all in on those test subjects.It took EV 1.7 at 55mm on a good contrasty subject to get a good quick focus lock using the OMD-M10 Mark II. The OMD-M1 Mark II couldn't do that, so a case where the AF system on the cheaper camera was a better match.This is a common lens. Of all the kit lenses I have used or tested, this is really the only one from any of the camera makers that I can truly recommend. On Canon DSLR bodies, I have had no problem producing extremely sharp 24x36 inch prints over the last 19 years. I have found that the performance of this lowly cheap lens has been better than several of Canon's faster versions in this zoom range as long as you burn a stop and don't shoot architecture straight on at 18mm due to the distortion. I have had Nikon, Sony, and Pentax kit zooms of range and I sold them all because the resolution and sharpness was poor compared to the Canon 18-55. Only the Olympus 14-42 optics came closer, but all the copies I have of them are poorer than the Canon, though I would rate them better than the others. What is even better with the Canon optic is that all four of the copies I have of this cheap optic are all great performers. Go figure.Now that is on a Canon DSLR. How it does on a Olympus or Panasonic m4/3 body is another matter.I haven't checked to see what the IQ will be with this optic as I have the Oly 12-40mm f2.8, so there is no point, but if you don't have that fine optic, and have the Canon kit lens, or the 18-135, it is worth a try.Tokina 12-24mm F4 - I can't think of a compelling reason to use this lens on m4/3, but it does work very well on the M10 Mark II, as well as the Canon 135mm F2. However, it doesn't work well on the M1 Mark II.If you have one, it should make an excellent 24mm equivalent WA. It does prove that other third party optics are likely compatible. I don't really use this lens anymore as I use the Sony A7R II for wide and extreme wide angles as it is fantastic at that.A note on my background. I have been shooting for over 50 years and have worked as a professional and semi-professional photographer as either part of my job as an industrial designer or as a professional wildlife photographer for about 10 years. I learned long ago to be very picky about lens image quality but also realized over 40 years ago that the name on the optic was not that important. I have had Leica, and Zeiss lenses that were utterly terrible or just substandard and had lenses with low end names on them that were the best of their type and focal length. Assume nothing.

I have a number of Canon lenses and thought it would be good if I could use them on my Lumix GH4. There are simple mechanical adapters but this one was advertised to allow auto focus and camera controlled iris. So far none of my Canon lenses work properly on my camera, I am in the situation that if I want to use my Canon lenses with this adapter I can only use them as manual lenses. I could have achieved that level of functionality with a mechanical adapter for a third of the cost, Maybe it will work for others but be prepared to be disappointed.

I have successfully used several Canon EF lenses with this adapter.

The auto focus worked ok with my Olympus OM-D E-M10 Mark but does NOT work on my Olympus OM-D E-M10 Mark 4. I can adjust the aperture but auto-focus does NOT work with the mark 4. There is a port on the adapter to do an update, but the company hasn't released any updates for it.

This product is still new on the market and there is room for growth, website does not have clear info on firmware updates, either way didn't work well with my GH6 may be GH5 and under could work.Was expecting an adapter firmware update, but none on their website.