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Forum: Video and Pentax HDSLRs 01-05-2010, 07:29 PM  
new 14MP sensor for 1080p @60fps !
Posted By richtrav
Replies: 6
Views: 10,427
That is a LOT of megapixels to cram onto such a tiny sensor. It sounds like it'll be doing 60fps by binning so I'm not sure the quality will be that much better than other sensors out there currently.
I'm still waiting for a 4/3" to APS-C sensor to come out that can do 24+fps at full res (at least in 16:9 cropped mode) at an affordable price. Still no sign of one yet at that size, only at 1/1.8" and smaller. Kodak is building some impressively fast, relatively large CCD sensors but is targeting them more for industrial use
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 12-24-2009, 11:30 AM  
NX10 Pancake Lens 30mm Pictures.
Posted By richtrav
Replies: 22
Views: 23,352
The NX10 looks like an interesting camera. My biggest concern would be how much Samsung has improved the known issues of its current APS-C sensor. The K-7 can overheat very fast in Live View mode, which often leads to shadow banding. With the NX10 Live view is basically going to be running all the time, I certainly hope Samsung has worked out the heat and banding issues
Forum: Video and Pentax HDSLRs 12-21-2009, 03:05 PM  
Videos and clips with the K7?
Posted By richtrav
Replies: 8
Views: 3,052
No you can't stop and take an instant picture while recording, but it is very easy to extract a single frame of the video in Quicktime, just pause it on the frame you want then copy and paste it into Photoshop or whatever program you use
Forum: Video and Pentax HDSLRs 11-26-2009, 08:13 PM  
A video Pro's take on the K7
Posted By richtrav
Replies: 11
Views: 7,316
Neat, glad they like it. Yes the quality with good light is right up there, if they don't provide manual control in the K-7 hopefully they will do so in the next model (it will pretty much be a must-have feature by 2010, along with 1080p I would think).

Just curious, did they use the default settings for the camera or make any adjustments to the image settings?
Forum: Video and Pentax HDSLRs 11-20-2009, 06:49 PM  
K-x video samples
Posted By richtrav
Replies: 157
Views: 39,532
500 megabytes is their max, mp4 is probably the best encoding to use for their site, they have a guidelines section if you're not sure what to use. The original file only stays up for a week
Forum: Video and Pentax HDSLRs 11-17-2009, 02:27 PM  
best settings for k-7 video mode?
Posted By richtrav
Replies: 4
Views: 4,116
Yes, the settings absolutely have an effect on the video. Jan has it pretty right, setting the sharpness to -2 gets rid of most stairstepping effects without causing too much blurring, -3 or -4 is often too much and only reserved for situations where you need as much smoothness as possible. The other settings (tone, contrast, hi-low key) can be pretty much adjusted to taste, the contrast and hi-low keys can come in handy for reducing noise in moderately lower light situations; the best thing to do is try some adjustments, zoom in to x6 in live view to see how noisy the shadows look on the screen, then readjust if necessary. Once you're happy with them start recording. Also doesn't hurt to keep the live histogram on when making your adjustments

If you're shooting in 720 mode I wouldn't go below -1 for sharpening, at 720 a sharpness of -2 or lower is more aggressive than at 1024 and can lead to detail loss.

And whatever mode you're in, don't even consider anything below *** quality
Forum: Video and Pentax HDSLRs 11-10-2009, 09:51 AM  
Timelapse software
Posted By richtrav
Replies: 11
Views: 10,221
I forgot to add that Mpeg Streamclip can also do it, you just drag every JPEG you want into its window and it assembles them as a video. The only problem I've seen is that they always come out to 15 fps and I can't figure out how to retime it to a faster rate
Forum: Video and Pentax HDSLRs 11-07-2009, 09:28 PM  
Timelapse software
Posted By richtrav
Replies: 11
Views: 10,221
Note this only applies for Photoshop, but IF you have a video-enabled version of Photoshop (like CS3 extended) it's extremely easy, all you have to do is put all the pics into a folder, go to Open in Photoshop and make sure the "Image Sequence" box is checked and just select the first file in the folder. Note that you only want the files you'll use for your the video in the folder because it takes every single picture in the folder and throws it into your video file. It will then prompt you for the frame rate you want and you're set. When you're ready you then export it as a video (I think the command is Render Video, where you can set the resolution, compression scheme etc). I've been doing this with thousands of files and it is easy but the rendering is pretty slow when many hundreds of pictures are involved (though you can just walk away for a while and let Photoshop do its thing).

That is by far the easiest way I know of turning still pictures into a video; you can also run a script in photoshop that loads the files into a stack but it takes many more steps to do and the pictures load backwards, which you then have to reverse: that is after you've changed them into layers then convert them to frame animation blah blah blah. It's much easier to open them as a simple image sequence and then render it as a video. This method can also turn the k20d's 21 fps burst mode into essentially a short soundless video mode.
Forum: Video and Pentax HDSLRs 11-03-2009, 10:29 AM  
Pentax K-7 and Final Cut Express
Posted By richtrav
Replies: 2
Views: 2,441
Sure I'd bring it straight into FCE if I were you (it's 1280x720 right?), but you may want to convert to a lossless codec if you're sending the output from FCE to another program before your final output. Now if FCE isn't your first stop then yes, you may want to go from your first program, say Photoshop or whatever, to FCE via a lossless codec. The trouble comes when you start taking your video from program to program and use lossy formats along the way; eventually the quality suffers.
Forum: Video and Pentax HDSLRs 11-02-2009, 11:39 PM  
Maybe An Email Camapign To Persuade Pentax To Give Us Full Manual Video Mode
Posted By richtrav
Replies: 136
Views: 21,645
If it operates like the K-7 you can pretty much predict what it's going to be by taking the camera out of video mode, put it in a still mode (keeping the aperture the same), then lower your shutter speed to the 1/30-1/40 sec range (possibly down to 1/25 for the K-x, I'm not sure). If you can get ISO 100 out of a given aperture and a 1/30-1/40 shutter speed then you can be pretty sure that's the ISO you're gonna get; the K-7 seems to pick a slower shutter speed over higher ISO every time, right down until you hit that 1/30-1/40 floor - only then will it bump up the ISO
Forum: Video and Pentax HDSLRs 11-01-2009, 10:03 PM  
K-x video samples
Posted By richtrav
Replies: 157
Views: 39,532
What am I missing? I'm not seeing any moire issues in those screen shots.
Forum: Pentax DSLR Discussion 10-29-2009, 09:27 AM  
Lumolabs: K-x vs. K-7 and the dynamic range champion of 2009
Posted By richtrav
Replies: 64
Views: 13,625
Not at all, some of us really enjoyed it ;)
Forum: Pentax News and Rumors 10-28-2009, 10:45 PM  
FF in 2010?
Posted By richtrav
Replies: 635
Views: 98,205
They can add lots aside from more mp: better high ISO performance/dynamic range (at least on the K-7), a faster burst mode, 1080 video w/manual control and variable frame rate and AF w/stereo mics and windcutting option, geotagging, 3-D leveler, a more robust intervalometer, better contrast AF, an articulating better LCD screen (SVGA and/or OLED?), in-camera HDR processing without tripod use, an APS-H sensor (just kidding! we've been over this already and it seems to be a no-starter, even though most of their digital lenses can handle it).

In short, pretty much a laundry list of what you'd expect from a 2010 digital camera. Pentax seems to have found their niche by offering well-spec'd, small cameras at prices below the competition's comparable offerings.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 10-27-2009, 09:35 PM  
Canon 7D video shoot
Posted By richtrav
Replies: 7
Views: 6,672
Mmm, I love the K-7 but have to admit in that kind of light the 7D will probably outshoot it. The Pentax really does best with decent light. Its 1536 mode keeps up pretty close detailwise with the Canons, and it has a better 720 mode outdoors or in well-lit conditions indoors. And yes I think the K-7 does have a certain "look" to its images that I have yet to see in any other DSLR.

I've been playing with some shots the camera store let me take with the Casio EX-F1 today and was quite impressed, its video is every bit as detailed as the K-7 in 720 mode with less aliasing (even though it doesn't look as "filmlike"), but if you shoot the camera in fast burst stills mode and compile them as extremely short clips (as done with the k20d) you can get stunning detail on the level I assume will only be available on Red's Scarlet. The chip on the F1 is amazing, 60 fps at full 6mp sampling!!! If only the buffer went beyond 60 frames
Forum: Video and Pentax HDSLRs 10-22-2009, 03:52 PM  
Maybe An Email Camapign To Persuade Pentax To Give Us Full Manual Video Mode
Posted By richtrav
Replies: 136
Views: 21,645
Yes I just tried it on the K-7 and it's true - if the lens is set to A you can't change the aperture while recording, if you manually switch aperture while recording it takes the camera a slight bit to readjust the shutter speed or ISO but it does correct itself unless AE-L is on
Forum: Video and Pentax HDSLRs 10-22-2009, 10:08 AM  
K-x video samples
Posted By richtrav
Replies: 157
Views: 39,532
This is the only video I've seen that appears to be original:

Pentax KX testing on Vimeo
Forum: Video and Pentax HDSLRs 10-21-2009, 06:17 PM  
K-x Sony Sensor vs K-7 Samsung Sensor
Posted By richtrav
Replies: 9
Views: 7,855
Hmm, one thing the K-7 (and Nikon) does differently is use motion jpeg compression, which chews through memory but does take a separate shot for each frame produced and results in subtle changes from frame to frame, like film would give. Canon uses h264 compression which only records the change from frame to frame between keyframes. That can cause no movement over static parts of the image, which can look unnatural at times (some people even add a little grain to their videos later to make them look more "real"). Canon also seems to crush the blacks quicker than Pentax and generally applies more noise reduction to their images so fine details can look mushy. I've heard Panasonic clips the blacks quickly too but haven't used one. But that's part of the K-7's overall philosophical approach to noise and detail.

Canon's video really isn't that bad if you use Faithful or Neutral mode and maybe adjust the contrast a little down and put the sharpening at 1 instead of 0 (but no higher than 2). The default settings are way too harsh and coarse, with the look of a cheap videocamera or 10-year old digicam. By contrast the K-7 takes nice videos right out of the box, with good dynamic range and detail and subtle tonal gradations that gives for a more filmlike look. Resolution-wise the K-7's 1536 mode also gives the 1080 mode on the Canons a good run for their money

One area where Pentax notably got it "right" was by deriving its 720 mode from downsampling and cropping off the larger 1024 image. Other camera makers apparently use a coarser sampling routine for their 720 mode which gives a less detailed image (or they don't go higher than 720 at all in Nikon's case). The K-7 is definitely ahead of the Nikons in terms of detail and crispness but the overall look is not dissimilar

The two drawbacks to the K-7's videos are the higher levels of moire/color aliasing and, less critically, the lack of a higher data rate in 1024 mode. Other than that it's really exceptional for a first generation implementation from a company with no video experience. I hope they continue their excellent video in the next model and don't shy away from going with formats other than the rigid 16:9 1080 or 720 modes, especially if more can be done from the sensor's readout (the full-frame 1536x1024 on the K-7 being an example).

I've only seen one video from the k-x online and it's indoors and a bit grainy, hard to tell anything from it. We'll see, I imagine it will resemble Nikon's videos
Forum: Pentax News and Rumors 10-21-2009, 08:59 AM  
FF in 2010?
Posted By richtrav
Replies: 635
Views: 98,205
Falk

Great info, thanks for the links. According to that calculator, an APS-H chip of the size seen in the 1D series would yield 114 chips vs 164 APS-C chips and 66 FF chips. What would you guesstimate the other variables would run (yield rate, etc)?
Forum: Pentax News and Rumors 10-21-2009, 01:41 AM  
FF in 2010?
Posted By richtrav
Replies: 635
Views: 98,205
Back in 2001-2002 the cost of FF sensors was extremely high due to, among other reasons, the high number of rejects. Perhaps Sony has refined the process to make the cost more manageable, but if you were starting from scratch (as Samsung would have to do), the APS-H size should be cheaper to make and have fewer rejects simply because of the smaller physical size. How much cheaper is unknown to me. The high price of the Leicas and D1 series probably comes from their expensive bodies and electronics (Canon) or their marketing/boutique pricing strategy and low production volume (Leica), not because of the size of their sensor. Is the new FF Leica cheaper than the previous APS-H model? (it's not a rhetorical question, I honestly don't know the answer). I guess someone here could give Kodak a call and see what they charge for a FF sensor vs the APS-H one (be sure and ask for the volume discount)
Forum: Pentax News and Rumors 10-20-2009, 10:11 PM  
FF in 2010?
Posted By richtrav
Replies: 635
Views: 98,205
Why would FF be cheaper? APS-H is a smaller sensor, it should cost less if done in any significant quantities
Forum: Video and Pentax HDSLRs 10-20-2009, 09:50 PM  
Maybe An Email Camapign To Persuade Pentax To Give Us Full Manual Video Mode
Posted By richtrav
Replies: 136
Views: 21,645
1080p via firmware? LOL, interesting question. The 1024 mode is so close already, I guess there might be a way to upres it to 1620x1080 in-camera (I've done it several times via software though a good HDTV can do just a good a job at upscaling). Of course you'll see no more detail than what was recorded at 1536x1024, which it is already giving the 1080 modes from certain other camera makers (I won't mention Canon by name) a good run for their money. If anything I'd like to see them have a 4-star quality setting for the 1024 mode, I think it's still a little short of its full potential. Now I don't see why you couldn't have a 1536x864 option, keeping the max horizontal resolution but with a 16:9 ratio. Mmmm, thinking about that I dunno, the downscaling on the 720 mode is already so good I'm not sure such a mode would lead to any more detail.

+1 by the way for more manual controls (and AF while recording as was promised!). I'd probably rarely use them, but the specs look good on paper and help keep up with the competition, especially if a K-8 isn't coming out any time soon. A combination of shutter and aperture control like the new Nikons have would do fine. It would also be really really nice to have the option to display the simulated shutter speed and iso while recording.

One small little easy feature I'd like to see them include is the option to have liveview turn off after shooting; in a hot climate like ours the camera can heat up really fast, and anything to help keep the sensor temp down would help (a lot of times I forget and just let it stay on even when I'm not using it)
Forum: Pentax News and Rumors 10-20-2009, 05:49 PM  
FF in 2010?
Posted By richtrav
Replies: 635
Views: 98,205
I didn't realize that, had to look it up but apparently you're right. I dunno though, I kind of have my doubts Samsung would go for an exotic size like that unless it was assured they could sell a decent number of them. Personally I like the idea, I used a Canon 1D once and thought the size was very nice, way "roomier" than APS-C. Would anyone have a lens-by-lens breakdown of which lenses would perform acceptably on such a camera?

It would all come down to price: if an APS-H sensor would only cost a fraction of a full 35mm sensor then it might be something serious to consider.

FWIW I did find this interesting article from 2007 (never panned out, but still interesting):

Could "K20D" actually be APS-H (1.27x) sized? - Photo.net Pentax Forum
Forum: Pentax News and Rumors 10-20-2009, 11:21 AM  
FF in 2010?
Posted By richtrav
Replies: 635
Views: 98,205
A clever idea, but who other than Canon makes APS-H sensors?
Forum: Video and Pentax HDSLRs 10-17-2009, 06:51 PM  
New Nikon D3S with 720p and M-JPEG !
Posted By richtrav
Replies: 6
Views: 3,474
Doh!!! Quiet Joe, we don't want a certain you-know-who to come back here and lecture us about how bad our vastly inferior mjpeg is.

Speaking of our inferior unworthy cameras, this appears to be the first original K-x video to hit the air:

Pentax KX testing on Vimeo

Not much to look at I admit, it would be interesting to know what kind of ISO we're talking about here. All I can see on my computer is a data rate of 35 mbits/sec. It's blurry and difficult to tell whether it has that distracting Nikon "8th line missing" phenomenon, if it does it's not that noticeable but that could be just because it's not shot under ideal conditions
Forum: Pentax News and Rumors 10-13-2009, 07:00 PM  
anything else coming in 2009?
Posted By richtrav
Replies: 170
Views: 23,210
Yeah but surely you don't think they'll be still pictures do you?
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