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02-24-2016, 02:37 PM   #1
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Does the Pentax K1 have EFSC

Does anyone know if the K1 has EFSC (Electronic Front Curtain), so that we can avoid shutter shake. The K3 does NOT have EFSC, but perhaps the K1 will. Anyone know?


Last edited by Nass; 05-23-2016 at 05:02 AM.
02-24-2016, 02:53 PM   #2
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QuoteOriginally posted by MichaelErlewine Quote
Does anyone know if the K1 has EFC (Electronic Front Curtain), so that we can avoid shutter shake. The K3 does NOT have EFC, but perhaps the K1 will. Anyone know?
Kenspo might know. We do know that Pixel-Shift uses an electronic shutter, so it seems like EFC is a possibility.
02-24-2016, 02:58 PM   #3
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I don't think so but I will confirm at CP+

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02-24-2016, 03:27 PM   #4
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It seems that EFC would help in cases where the image sensor is fixed relative to the camera body, where the mechanical connection can transfer vibrations from the shutter. Shouldn't the design of the SR system help mitigate that?

02-24-2016, 04:03 PM   #5
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there's something ion the specs about an electronic shutter in pixel shift mode, so it sort of has the capacity in part to initiate exposure electronically at least, but EFC not mentioned as far as I can see
02-24-2016, 04:50 PM   #6
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QuoteOriginally posted by ffking Quote
there's something ion the specs about an electronic shutter in pixel shift mode, so it sort of has the capacity in part to initiate exposure electronically at least, but EFC not mentioned as far as I can see
You are very correct. Pixel shift starts with movement of the leading curtain and ends with movement of the trailing curtain with three EFC events in-between to make four captures total. While EFC is demonstrated possible with the Pentax sensor, it has not been implemented in live view for general shooting in any Pentax camera.


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02-24-2016, 05:27 PM   #7
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Shutter shake's not a great problem for weighty DSLRs, but it has been a terrible problem on some Sonys prior to the current generation. They really needed it with longer lenses.


In a DSLR, the shutter is initially closed, but in a mirrorless it can be open, then shut (there's your shake!), then open for the shot, then shut again.


A Thousand Words A Picture: Mirror-Slap Versus Shutter Shock


http://community.sony.com/t5/Alpha-SLT-DSLR-Cameras/A7r-Shutter-shock-issue-...ns/td-p/268381

Last edited by clackers; 02-24-2016 at 05:44 PM.
02-24-2016, 08:13 PM   #8
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i think that ibis works at a different frequency than the shutter shake resonant frequency, so it may not help, except perhaps in continuous mode(bracketing, etc).

testing mechanical shutter vs. efcs vs. silent shutter, on sony ff mirrorless:
"...the bulk of the motion imparted to a tripod mounted mirrorless camera with no added delay between winding the shutter and firing the first curtain comes from the winding action, not the motion of the first curtain."
Sony a7R, a7RII shutter shock: Sony Alpha Full Frame E-mount Talk Forum: Digital Photography Review

d810 vibration testing, same thread, efcs on vs. off... it makes a difference with dslrs, so it would be a desirable feature for the k-1:

"I beg to differ.
In the above posts, consider the D810 with the EFCS turned off a slightly better damped version of the D800 shutter.
Consider the D810 with EFCS turned on to be a slightly lower res version of the a7rII with EFCS turned on."
Sony a7R, a7RII shutter shock: Sony Alpha Full Frame E-mount Talk Forum: Digital Photography Review

first page of the thread, talking about continuous shooting with the 5dsr and it's efcs:
"For example, on the 5DSR I found that performing a bracketed exposure in continuous mode causes vibrations on the 2nd, 3rd, etc.. exposures even with the camera in LV and with Canon's EFCS turned on (test here). The reason for the vibration is that the camera doesn't insert any delays in between exposures of the bracketed sequence, which means only the first exposure benefits from the EFCS (ie, after the first exposure, the 2nd curtain closes, the 1st curtain opens, and the second exposure starts right away, thus no settle delay and effectively no EFCS benefit). The only way to work around this on the 5DSR is to use a non-continuous mode and manually trigger each exposure of the bracket, which provides enough time for the shutter to settle between exposures and thus benefit from the EFCS. The problem with this solution is that it introduces scene-motion risk between exposures, such as the clouds, sea/lake, etc.."

02-26-2016, 06:39 AM   #9
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Michael - whose name I recognise - is interested in shutter shake because it is a big factor in macro focus stacking. Unfortunately I believe the answer is no
02-29-2016, 04:24 PM   #10
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CONFIRMED: Pentax K1 DOES NOT have an Electronic First Curtain Shutter (EFC Shutter)

Last edited by photolady95; 02-29-2016 at 04:49 PM.
05-23-2016, 04:51 AM   #11
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Just wanted to update on this as I now believe I have given an incomplete answer. EFSC is not default behaviour. However, pixelshift shots with a delay do use EFSC. So there are ways to make K-3ii use an electronic front curtain shutter (efsc).

There is no shutter sound immediately before the image taking when I use PS mode with 2s self timer or PS mode with mirror lock up, with or without remote control (PS = pixelshift). During these, the sequence is shutter/wait delay/ps/close shutter - that to me would seem like EFSC is being used. A sequence wait delay/shutter/ps/close shutter would not be EFSC because the shutter would impact the ps being immediately before it with no delay. So, the default is no EFSC, but it seems pixelshift does. Maybe that's why Pentax said no EFSC (because "normal" "default" shots don't use it), only pixelshift does.

Fwiw, I haven't been able to find any drive mode that gives EFSC without using pixelshift, but I don't have all my apparatus with me so I'm not in a position to test every drive mode/ps mode permutation.

Fwiw, I'm guessing it's the same on K1... if someone could confirm that'd be great.

Last edited by Nass; 05-23-2016 at 06:51 AM.
05-23-2016, 05:48 AM - 1 Like   #12
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Confirmed Nass. K-1 and K-3 behave in the same way.
05-23-2016, 06:31 AM   #13
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QuoteOriginally posted by wizofoz Quote
Confirmed Nass. K-1 and K-3 behave in the same way.
Excellent, thanks
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