Is EF-M mount worth investing for a new user

KEG wrote:

nnowak wrote:

jackwelch wrote:

nnowak wrote:

Neither of those two lenses will match the 600mm equivalence of the OP's current camera.

Full frame 400mm lens on an apcs should be equivalent to 600mm due to the crop factor. I see many taking this route of adapting full frame lenses on smaller size sensors like apsc or M43 for that added reach instead of using their native lenses.

In fact it's often been said the best teleconverters are full frame lenses on smaller sized sensors.

Yes, 400mm on APS-C will get you to 600mm equivalent. KEG's suggestion of using a 250mm or 300mm lens falls quite short.

1. the trouble with M3 is probably the AF system, not the sensor, the sensor is capable of great results at ISO 100 and all the way to about 1600, of course that never stops me to go to 6400.
2. It is possible to use the 250 lens with kenko teleconverter, same teleconverter also works with 70-300.
3. the 15 mp image might look nicer than the 20 MP one from G3 X due to sharper lens.

I get that you like your M3, but my experience with the camera is quite different.  Without reservation, I would classify it as the worst M series camera Canon relased for the system.  The AF was even worse than the original M, the firmware was full of bugs and ommisions, and the colors were so weird that many thought Canon had switched to a Sony sensor.

Today, there is zero reasons to recommend purchasing a used M3 when you can get the far better M100 for only 10% more money.  Even a used M6 is only around $75 more expensive.