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05-17-2009, 10:48 PM   #3196
ogl
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QuoteOriginally posted by jaad75 Quote
And you where acting like you know something about K-7?...
It is AF-assist lamp. Just like the one in X70.
You will see...In 2 days.

05-17-2009, 10:49 PM   #3197
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QuoteOriginally posted by jaad75 Quote
No. It means interlaced and it has a lot to do with fps. With 1080i you're getting 60 half frames of 540 lines in one second.
So how many frames per second can we expect then?
05-17-2009, 10:51 PM   #3198
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QuoteOriginally posted by jaad75 Quote
And you where acting like you know something about K-7?...
It is AF-assist lamp. Just like the one in X70.
X70's AF lamp is different, like the nikons. Pentax's small sensor cams are outsourced.
05-17-2009, 10:59 PM   #3199
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QuoteOriginally posted by JHfwp Quote
So how many frames per second can we expect then?
It depends - some modern displays keep one halframe in a buffer and display two of them simultaneously at 30fps making it 1080p technically...

05-17-2009, 11:22 PM   #3200
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Ugh... 1080i again does not need to be 60fps...

1080i can be used at 30fps, actually 29.97 which is perfect but again it doesn't have to be 50 or 60 fps. What you guys are misreading is Hz and FPS. 1080i as well as MOST video is recorded at 50-60Hz so it illuminates the screen without showing the flaws or interlacing which shows the video display at every other line. Means HD quality but a smaller bandwidth. With progressive you show every line from top to bottom which takes more data bandwidth and is still recorded at 50-60Hz.
05-17-2009, 11:37 PM   #3201
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There it is, thanks. Then it doesn’t seem to work on my k10, or alternatively, the rotationally freedom is extremely small as I fail to observe it when watching the sensor and trying to provoke it to turn.
05-17-2009, 11:41 PM   #3202
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QuoteOriginally posted by codiac2600 Quote
Ugh... 1080i again does not need to be 60fps...
Where did I write anything like that? I was talking about half-frames...
05-18-2009, 01:11 AM   #3203
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QuoteOriginally posted by glanglois Quote
I'm not sure I got this
That's a great explanation of echo cancellation in a telecommunications system or perhaps of a digital frequency filter. But .....

In my hands, at any rate, the tremor is quite irregular and therefore not necessarily predictable on a millisecond basis. My hands go back and forth but not evenly like a pendulum.
[...]
Pentax may still be using the Invensense IDG-300 for this purpose.
Ok, I gave a simplistic description (which is only correct for periodic shake) to say something about the "loose the brakes" idea for SR ...

A more appropriate description would have been to compare the situation to that of noise cancellation where the phase is actually inverted (note that noise is irregular, too). Works only above a given frequency. Below this frequency (i.e., for frequencies of shake where only a few or less than one oscillation occur) you would counter-move in real time w/o waiting.

But this is no problem because at those low frequencies, the latency of the entire SR system can be ignored. The tricky part is how to compensate for those higher frequencies of shake ... There is a chance that Pentax doesn't treat those higher frequencies at all (Human tremor is at frequencies between 4 Hz and 15 Hz). If so, then you are perfectly right and the system doesn't "anticipate" anything (no noise cancellation at all). Then however, the system would perform poorly for short shutter time at long focal lengths. Maybe, it does...

Pentax never published their exact algorithm but it was noted that it works best for exposure times of 1/15s. They don't use the IDG-300; but two similiar (smaller) chips, one per axis.

05-18-2009, 01:47 AM   #3204
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Will the new focusing screen/viewfinder still use etching for displaying AF points? Or will it be liquid crystal like the Nikons?

I hope it'll be liquid crystal, it's really nice to be able to choose your display like whether or not to display a grid. Also nice to be able to see a clear screen until you half-press and see which AF points are active.
05-18-2009, 02:49 AM   #3205
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QuoteOriginally posted by codiac2600 Quote
Ugh... 1080i again does not need to be 60fps...

1080i can be used at 30fps, actually 29.97 which is perfect but again it doesn't have to be 50 or 60 fps. What you guys are misreading is Hz and FPS. 1080i as well as MOST video is recorded at 50-60Hz so it illuminates the screen without showing the flaws or interlacing which shows the video display at every other line. Means HD quality but a smaller bandwidth. With progressive you show every line from top to bottom which takes more data bandwidth and is still recorded at 50-60Hz.
How is the refresh rate of the display device relevant when we're talking about digital video? Every frame is stored once, and that's it. The video stream knows nothing about refresh rate.
05-18-2009, 03:12 AM   #3206
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got it here
05-18-2009, 03:16 AM   #3207
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QuoteOriginally posted by jaad75 Quote
And you where acting like you know something about K-7?...
You guys should believe what ogl has been telling you.
05-18-2009, 03:17 AM   #3208
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QuoteOriginally posted by comet4 Quote


got it here
Is that a FA77/1.8 limited on that K-7?

Wim
05-18-2009, 03:18 AM   #3209
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QuoteOriginally posted by comet4 Quote


got it here
Prime II
100% viewfinder
14.6 million pixels.
3Inch LCD 920 dots
HDMI
Better SR.
Ultrasonic Dust removal
Mag Alloy body
HD movies

Last edited by Steelski; 05-18-2009 at 03:23 AM.
05-18-2009, 03:18 AM   #3210
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QuoteOriginally posted by mcjm78 Quote
Yes.. there are 4 LED on top of the flash in that picture... so the flash now has the normal "flash" as well as 4 LED for AF assist or Video light.. am I correct?
Folks, could we read any replies a post has before we leave a reply ourselves? Several of the posts between the one you replied to and your own pointed out that the flash pictured is indeed a doctored photo of the K-m's flash. It's fake.
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