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Author Topic: Why isn't there silent shutter on IQ3 100?  (Read 1140 times)

yashima

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Why isn't there silent shutter on IQ3 100?
« on: February 13, 2016, 03:21:15 pm »


Considering IQ3100 has the same technology as the sensor in A7rII, why don't we have silent shutter on IQ3100?

We would be able to use shutterless lenses on tech/view cameras, and that would open up quite a lot of new possibilities.

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Graham Welland

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Re: Why isn't there silent shutter on IQ3 100?
« Reply #1 on: February 13, 2016, 03:43:24 pm »

The sensor in the IQ3 100 still needs darkness to read out the full resolution image. There is a mode with the XF electronic first curtain shutter where the image is shot with the shutter fully open but as it was described to me the focal plane shutter still needs to pass down over the sensor to read out the captured image.
« Last Edit: February 13, 2016, 10:50:49 pm by Graham Welland »
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Graham

bjanes

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Re: Why isn't there silent shutter on IQ3 100?
« Reply #2 on: February 13, 2016, 04:44:50 pm »

Considering IQ3100 has the same technology as the sensor in A7rII, why don't we have silent shutter on IQ3100?

We would be able to use shutterless lenses on tech/view cameras, and that would open up quite a lot of new possibilities.

See this article by Jim Kasson describing the silent shutter on the Sony A7S. The electronic first curtain moves quite rapidly, but the electronic equivalent of the second curtain is much slower since the exposure ends when the image data is read out--continuing exposure on the sensor will have no effect on the image. With the A7S this takes 1/30 sec from start to finish. Since the IQ3100 has a higher MP, the readout would take even more time and, depending on the readout speed, an electronic second curtain may not be feasible.

Regards,

Bill
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Ken R

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Re: Why isn't there silent shutter on IQ3 100?
« Reply #3 on: February 13, 2016, 06:30:50 pm »

See this article by Jim Kasson describing the silent shutter on the Sony A7S. The electronic first curtain moves quite rapidly, but the electronic equivalent of the second curtain is much slower since the exposure ends when the image data is read out--continuing exposure on the sensor will have no effect on the image. With the A7S this takes 1/30 sec from start to finish. Since the IQ3100 has a higher MP, the readout would take even more time and, depending on the readout speed, an electronic second curtain may not be feasible.

Regards,

Bill

Bingo.

I was gonna say that it would take an extremely fast readout speed to handle the 100 MP's.

With non flicker free lights (typical) it is quite easy to see banding when using the electronic shutter on the Sony (or Fuji etc) with higher shutter speeds than about 1/60-1/80s. With cine lights (HMI's, Kino-Flos etc) it is not an issue.
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