Recent M6 Mark II shutter shock study / M50 upgrade path rant

R2D2 wrote:

nnowak wrote:

Have you verified that there are two independent actuators/motors on the M6 II shutter?

The more basic shutter mechanisms that have been used for decades only have a single actuator/motor. Think of the film advance lever on an old SLR where both curtains need to fully travel before you can advance the lever again. One actuator/motor cocks both shutters on every cycle. With a single actuator/motor you can do mechanical shutter, or stop the shutter cycle mid process and do full electronic shutter.

A compact camera I disassembled a couple years ago just had a lone, rudimentary brushed DC motor for the shutter. I could spin the drive gears with my finger and cock both shutters, fire the first curtain, and then fire the second curtain. It worked in a non-reversible loop. The camera could do mechanical shutter or fully electronic shutter, but EFCS was impossible.

As for the prior M system cameras that only offered EFCS, those cameras used a single actuator/motor and completely omitted the first curtain from the shutter.

So, yeah, there is a good chance it is a hardware limitation.

Of course. That's why I posted the info for people..

There have been tear-downs of the M6ii available since its release. An interesting note is that the M6ii's 2nd curtain motor is substantially larger than the first curtain!

R2

Nice contributions, @nnowak&R2