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

R2D2 wrote:

nnowak wrote:

R2D2 wrote:

nnowak wrote:

Nigge wrote:

I can’t understand why they still hasn’t fixed this serious issue in m62 by new FW.

You are assuming that it can be fixed with firmware. There is a good chance it is actually a hardware limitation.

I think EFCS could be implemented in firmware.

As I said, it totally depends on the possible hardware limitations. EFCS requires the first curtain to be locked open and then only the second current travels independently across the frame. With mechanical and fully electronic shutter, both first and second curtains are working together.

Obviously the first curtain can be locked open and controlled independently of the second curtain. It’s what gives us “live view” and electronic shutter. And indeed there are two separate controllers and motors that wind and operate the two curtains independently.

I have no doubt that Canon could implement EFCS via firmware. They just don’t want to!

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.

It’d be a good fix. However I think that the root cause of the M6ii’s shutter shock is the very energetic shutter mechanism that gives us the whopping 14 fps. That’s something that we (actual owners) will have with us forever.

R2

Obviously the shutter mechanism is the main culprit and there appears to be some sample variation on the ferocity of M6 II shutters. Lens construction might also play a role as heavier adapted EF lenses are much less susceptible. The ultra-lightweight 15-45mm seems to be more susceptible than the other, heavier EF-M lenses.

Indeed. As I and others here have mentioned previously, shutter shock has had minimal impact on our shooting. But I’d still like to see EFCS implemented! If not for me, then for the others’ benefit.

R2