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10-10-2013, 01:26 AM   #166
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QuoteOriginally posted by fuent104 Quote
Global shutter, the opposite of rolling shutter, is desireable
for video, yes (global electronic shutter, as opposed to rolling electronic shutter).

However, most possible analog implementations of a global electronic shutter (charge buffers) have a negative impact on image quality, be it read noise or full well capacity. Digital implementations could avoid that but don't exist and would be very expensive, esp. with high pixel counts.

The jello effect is reduced by faster readout speeds and I expect that with increasing sensor speeds (I hear of 1080p@120Hz sensors and 4k video coming soon) the jello effect will become small enough to lift the pressure to make a global shutter. It is kind of a race and it remains to be seen if a global electronic shutter will ever come to a still camera.

Note that the K-3's mechanical shutter is a rolling shutter too (corresponds to 4000p@180Hz) and nobody ever complained about its rolling shutter effect in stills...

10-10-2013, 01:47 AM   #167
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It is quite reasonable to expect that they would not use the exact same menu name to mean two different things, Falk.

QuoteQuote:
I just assume Pentax not to expect a user to compare user manuals..
Many of us here own more than one Pentax camera, to my mind that's exactly what users will do and Pentax would certainly be careful in keeping things standardised across models. It just makes sense.

Last edited by Steve.Ledger; 10-10-2013 at 02:48 AM.
10-10-2013, 03:02 AM   #168
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QuoteOriginally posted by sledger Quote
It is quite reasonable to expect that they would not use the exact same menu name to mean two different things, Falk.
Yes, if things were different.

But both menu items designate stabilization during video. It is just not meaningful to deduce implementation from this.

It is like saying: the K50 has a burst mode menu item, so the K-3's burst mode must be same speed as K50 because they named it the same. It simply isn't a possible deduction. Same for "Movie SR".
10-10-2013, 03:10 AM   #169
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QuoteOriginally posted by falconeye Quote
It is a separate setting from SR on/off during stills, hence the different menu item name to avoid user confusion.
- which is a good idea, so the user knows that (s)he is only affecting movie SR when changing the setting here. I don't think "Movie SR" means a specific implementation in "Pentax lingo". My 7 year old (and still waterproof ) Optio W10 has the "cheap" electronic variant, and Pentax called it "Movie anti-shake" back then.

10-10-2013, 03:23 AM   #170
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On DSLR using sensor stabilization for video they call SR for "Shake Reduction" for both photography and video, but on cameras using digital SR for video they only use "Shake Reduction" for photography and "Video SR" for video.

So at least so far they have used a separate name for "digital SR".
10-10-2013, 03:24 AM   #171
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QuoteOriginally posted by falconeye Quote
and nobody ever complained about its rolling shutter effect in stills...
It's quite visible if you're trying to freeze the movement of some objects with a shutter instead of short duration flash. Not only in Pentax cameras of course.
10-10-2013, 03:54 AM   #172
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QuoteOriginally posted by falconeye Quote
nobody ever complained about its rolling shutter effect in stills...
Well, a couple of years ago my son asked me what happened to the walls of the houses he shot with his iPhone 3G out of the window of a train :-)
10-10-2013, 04:27 AM   #173
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the best part is hat i was ready to by a gh2 or 3 for video but seems that the k3 will be a great video camera...we must wait for an hack like gh2 to have the best anyway.

10-10-2013, 05:19 AM   #174
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QuoteOriginally posted by gazonk Quote
Well, a couple of years ago my son asked me what happened to the walls of the houses he shot with his iPhone 3G out of the window of a train :-)
The little word "its" in the quoted text referred to a focal plane shutter. The iPhones have no such shutter.
10-10-2013, 05:34 AM   #175
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QuoteOriginally posted by falconeye Quote
The iPhones have no such shutter.
It doesn't matter, the regular FP shutter gives you the same results with objects moving fast enough.
10-10-2013, 09:58 AM   #176
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QuoteOriginally posted by jaad75 Quote
It doesn't matter, the regular FP shutter gives you the same results with objects moving fast enough.
Post makes no sense when reading my posts again.
10-10-2013, 10:41 AM   #177
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At this point I think that all we can do is wait for some video-oriented testers to get their hands on the K-3 and really put it through its paces.
10-10-2013, 11:30 AM   #178
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QuoteOriginally posted by sledger Quote
It is quite reasonable to expect that they would not use the exact same menu name to mean two different things, Falk.


Many of us here own more than one Pentax camera, to my mind that's exactly what users will do and Pentax would certainly be careful in keeping things standardised across models. It just makes sense.
QuoteOriginally posted by falconeye Quote
Yes, if things were different.

But both menu items designate stabilization during video. It is just not meaningful to deduce implementation from this.

It is like saying: the K50 has a burst mode menu item, so the K-3's burst mode must be same speed as K50 because they named it the same. It simply isn't a possible deduction. Same for "Movie SR".
Q/K-01/K-30/K-50 are the limited, different, mid range Menu set and control dial / button set. K-3/K-5/II is the full-featured Menu and Contol Dial set. It is natural to expect definitional and operational changes from the Mid-range Menu to the Full-Feature Menu.
10-10-2013, 03:36 PM   #179
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Anybody saw this? ->

It says twice the buffer size and 5x readout (14 Bit data transfer) speed.

If they make use of this 5x speed improvement when grabbing frames, assuming the same subsampling layout, then the jello effect could be reduced to 30% of that of the K-5. Theoretically. Maybe, this picture is wrong if it refers to the Milbeaut chip and the sensor itself is the bottleneck.
10-10-2013, 03:58 PM   #180
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There is an English version of it and it says 5x transfer speed and 2x buffer capacity. Animation clearly suggest that it is about processor- buffer transfer, not sensor readout speed.
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