Electronic shutter - When the rolling effect is visible?

[sebas1430]

Hi,

 

I understand how the ES shutter is working and why the rolling effect happens. However, it seems that Fuji doesn't officially provide how much time the process is taking to read all lines of pixels.

 

I found this article http://janssico.com/2014/12/x100ts-electronic-shutter-speed-analysis/ where it says that the processing is taking about 1/15 second, which is really long! Even for shooting portrait, this is too slow.

 

So I'm wondering if this fact is true...and from your experience, are you able to get good sharp results with ES shutter? (I'm still new to Fuji).

 

Thanks

[Max_Elmar]

The methodology looks pretty reasonable to me (with caveats - see below). In this implementation it would seem ES is kind of gimmicky with limited use. (Which maybe we should already know, because the tech would have driven MS out a long time ago?) File it under "mostly marketing" along with "World Fastest Autofocus."

 

I guess it is possible that the actual speed is some multiple of 1/15 (or fraction of .07) and that the bars are artifacts of the interaction of the flashing rate and the scanning speed. Just because the Adruino is set to flash at 100hz doesn't necessarily mean that that's what is actually happening with the LEDs. There is probably a switching power supply and/or an LED driver circuit in the mix. I would want to measure what was really going on with a fast light sensor and an oscilloscope to confirm the setup. My guess for the fuji sensor would have been 120-240hz not 15hz. But, the slow scan speed is consistent with some of the weird artifacts I've seen.

Edited June 8, 2016 by Max_Elmar

[flysurfer]

ES readout time depends on the camera. Obviously, X-Trans III has a faster readout then X-Trans II. Fuji's official number for the latter is 1/10s. X-Trans III cuts this in half.

[Sella174]

If you want something to fail, then you can setup the parameters so that the test gives a negative result.

 

That said, I've used the ES on many occasions when I do not want the sound of the shutter distracting the subject(s) and have never experienced any problems with it. Photo below was taken with an X-T1 & 55-200mm at 1/2400 of a second.

 

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