August 7, 2017 by Philippe
As I own a lot of 4/3 lenses (14-54mm, 50-200mm, 50mm, fisheye, etc), so an adapter is crucial. The advantage of the MMF-3 : it's weathersealed. So I can keep my 50-200mm, but also I can bring it with my OMD in the rain! The AF is very quick and accurate, especially with the 50-200mm.
February 17, 2016 by Tucson Jim
My Expensive Glass Doesn't Have to Gather Dust
The MMF-3 lets me use my 4/3rds 12-60mm and 50-200mm lenses (with and without the EC-14/20 teleconverters) on my OM-D E-M1. Auto Focus works well even with the teleconverters. I have even used it to connect a legacy MF 300mm Pentax SMCT lens without problems. It is manual focus of course and you have to manually stop down the lens, but focus peaking and light metering work great. I'll probably invest in some micro 4/3rds pro lenses eventually, but the MMF-3 means I can put off the expense till I can better afford it.
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January 21, 2016 by harvey
Keeps MFT Lenses in Use
This adaptor works perfectly with my 18-180, 100-300, and 50-200 Four Thirds lenses. I have an OMD EM-5. I bough these lenses for it for the range of the 18-180, the reach of the 100-300, and the image quality of the 50-200. There is no equivalent lens in the micro four thirds format for the 18-360 or the 50-200 so this makes sense, gives me two more lenses to carry.
December 15, 2015 by Kevin
Does The Job
Great product to extend the life of your older lenses and save money on upgrading to newer products. Of course, those older lenses may not be weatherproof, which is one of the features that appealed to me with the EM-1 system. I've also been in my old system for a long time, so looking forward to significant feature improvements in the new lens. So while this adapter certainly worked with my older lenses, I'm not certain how much use it will get.
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April 10, 2015 by Olympusaurus
A must have for old E-system users with an OM-D E-M1
My E series lenses work beautifully with my E-M1 now that I have this adapter. My 50-200 works better than it did on my native E system. Focusing is fast and more precise. It is not as fast as the micro lenses but allows for the effective use of that wonderful E-system glass. This adapter has delayed my purchase of the new 40-150 2.8 lens. I know focusing is better and all reports are great but I cannot give up the 50-200 when it works this well.
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