Shutter Shock - Size DOES Matter!

Started Jan 22, 2014 | Discussions thread
Anders W Forum Pro • Posts: 21,468
Re: Shutter Shock - Sony FF A7R

453C wrote:

skyglider wrote:

kbouk wrote:

skyglider wrote:

Thinking about this shutter shock problem, more mass would dampen vibration and result in less blur. But there may be another factor in play which is sensor size. With a larger sensor, vibration is a smaller percentage of the image.

So it stands to reason that micro 4/3 sensors would exhibit more blur due to shutter shock, APS-C sensors less blur, and FF sensors the least amount of blur.


I don't think so, the new FF Sony A7R has big problems :

Correcto mundo. Guess with a larger sensor the shutter has to travel a longer distance which results in more impact when the shutter bottoms out, resulting in a larger shock wave. Compared to less impact on a smaller micro 4/3 sensor.

Funny how Sony knew enough to include an electronic first curtain shutter in the Alpha 7 which came "first" and made a purposeful decision to omit it in the Alpha 7R which came "second". Sony works in mysterious ways.

I don't think the distance travelled is a factor. Everything else being constant, two identical cars striking a wall at the same speed impart the same amount of force, regardless of their starting point from the wall.

Hi there. Long time no see. Glad to see ya' back.

The distance travelled is a factor in the sense that the shutter blades of an FF camera have to travel nearly twice as fast as those of an MFT shutter in order to reach the same flash sync speed. They also have to cover roughly four times the area. So everything else equal, we should expect significantly more kinetic energy and momentum at play with an FF shutter than with an MFT shutter.

Differences in shutter and body construction (more mass, less force imparted to the rest of the camera, etc.) are probably in play.

I still think Ming Thein nailed it. Higher pixel density means images from the FF Sony A7 are more susceptible to motion blur, be it from shutter shock or some other force. The same movement that results in a relatively small shift on a MFT sensor may jump multiple pixels on a FF sensor, making the blur more apparent.

Like pretty much everyone else, I'd like to move past a mechanical shutter, but I was in need of an upgrade, and the E-M1 seems to meet so many other desires that I couldn't wait. I'm just happy we're slowly seeing progress on this front, and in a few years, we may have a camera with few moving parts to cause problems.

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