I would like to know if anyone has tried to use a Tamron 18 - 200 Di lll on a Canon M3 , I am aware that there were problems back in 2014 -2015. Since the M5 is due out later this month is it worth getting the Tamron 18 -200?
I tried it on the M and was not happy with the performance. It was generally soft in the corners no matter how much I stopped it down but had good center sharpness. It was also fairly large and heavy.
I would really look at the new EF-M Canon 18-150mm lens. I believe it will be a better alternative.