S5ii Electronic First Curtain Shutter

[Oíche]

I seemingly cannot get this to work no matter what settings I chose and reading the sections in the manual. I can feel the click at the start and the click from the rear curtain. It's also not the most subtle shutter either.

The purpose of EFCS is: "The electronic front curtain type reduces blur caused by the shutter because the amount of vibration from the shutter is small compared to the mechanical shutter type."

From the manual it states "mechanical shutter sound" but I can feel the curtain opening. The same occurs whilst using shutter delay.



"When using APS-C lenses, the electronic front curtain is not available." I am using 24-105 f4 and this has me flummoxed.

Quickly comparing EFCS to MECH the dual-pulse shock at exposure beginning is a lot quicker and lighter... But there is something mechanical still operating. Full ES has zero feel with or without a beep of your choice. I am confused as EFCS should surely be the same as ES followed with the mechanical click of the rear curtain.

I've always put importance on reducing mirror and shutter slap/shake/shock buying a huge heavy (for damping) Arca Swiss monoball for SLR/DSLR for the sharpest possible landscapes (especially long telephoto) back in the day.

 

[pdk42]

Are you sure what you’re hearing is the first curtain? Is the sound different between EFCS and mechanical?

Remember that the shutter needs to go through a reset cycle to be back at live view (open).

 

[pdk42]

The sequence of mech shutter should be:

- Bottom curtain rises to blank sensor.
- Charge wells are cleared down.
- Bottom curtain drops.
- Exposure begins.
- Top curtain drops.
- Exposure ends and charge wells are read.
- Both curtains rise (shutter closed) to top.
- Bottom curtain drops and live view restarts.

With EFCS, it’s:

- Charge wells are cleared down.
- Exposure starts electronically.
- Top curtain drops.
- Exposure ends and charge wells are read.
- Both curtains rise (shutter closed) to top.
- Bottom curtain drops and live view restarts

There’s still a lot of curtain movement even with EFCS.

 

[pdk42]

To fully test, do a long exposure with the lens off and you’ll see if there is activity before the exposure time.

 

[Oíche]

Are you sure what you’re hearing is the first curtain? Is the sound different between EFCS and mechanical?

100% I could video it and record it. Yes different sound and feel as previously descibed and still feel shutter shock on shutter opening when there shouldn't be although less so tham full mech shutter mode. Try it for yourself using 0.5 or 1sec etc. so you can definitely hear and feel it. I know you don't have S5ii any longer but the other ones.

Remember that the shutter needs to go through a reset cycle to be back at live view (open).

It is already open hence the EVF/LV feed so why should it have to close and open again? Literature suggests the same? Definitely some movement going on in EFCS except quicker and quieter as previously described. Rear curtain as normal as with mech shutter mode.