squig
Veteran
This thing does 57Mbps 720p 30p mjpeg
http://www.crunchgear.com/2009/05/20/official-pentax-unveils-the-k-7-dslr/
http://www.crunchgear.com/2009/05/20/official-pentax-unveils-the-k-7-dslr/
Meet the new kid on the block- Pentax K-7
- Thread starter squig
- Start date
txsbluesguy
Active member
various information
various information
so far the most is on the pentax forum compiled by a guy named "falconeye" his take is below
basically mjepg in avi wrapper
New from http://www.pentaxforums.com/forums/603606-post3676.html in THE THREAD:
Movie (All AVI/MJPEG at 30 fps):
format *quality* "duration until 4GB full" -> MBit/s data rate / "kByte/image frame"
1536 x 1024p *** 7:23 -> 74.0 / 316
1536 x 1024p ** 10:22 -> 52.7
1536 x 1024p * 14:40 -> 37.2
1280 x 720p *** 9:26 -> 57.9 / 247
1280 x 720p ** 13:19 -> 41.0
1280 x 720p * 18:37 -> 28.4
640 x 416p *** 31:55 -> 17.1 / 73
640 x 416p ** 41:44 -> 13.1
640 x 416p * 60:57 -> 9.0 / 38
74.0 MBit/s or 9.2 MByte/s is twice the data rate of a Canon 5Dmk2, so far industry's best. Quality would be comparable, because of MJPEG vs. H.264.
Earlier in this thread, I had computed ~250 kB would be a good quality (*** JPEG) for a video frame image. The K20D 21 fps burst image are about 900 kB each, but compression quality hasn't been their problem
Given that a 1024p 3:2 video stream would be free of motion compression artifacts, this is very good news.
Let's hope that the K-7 1536 x 1024 mode isn't really 768 x 1024 internally (as with K20D). Or at least, that the 720p mode is a true one.
various information
so far the most is on the pentax forum compiled by a guy named "falconeye" his take is below
basically mjepg in avi wrapper
New from http://www.pentaxforums.com/forums/603606-post3676.html in THE THREAD:
Movie (All AVI/MJPEG at 30 fps):
format *quality* "duration until 4GB full" -> MBit/s data rate / "kByte/image frame"
1536 x 1024p *** 7:23 -> 74.0 / 316
1536 x 1024p ** 10:22 -> 52.7
1536 x 1024p * 14:40 -> 37.2
1280 x 720p *** 9:26 -> 57.9 / 247
1280 x 720p ** 13:19 -> 41.0
1280 x 720p * 18:37 -> 28.4
640 x 416p *** 31:55 -> 17.1 / 73
640 x 416p ** 41:44 -> 13.1
640 x 416p * 60:57 -> 9.0 / 38
74.0 MBit/s or 9.2 MByte/s is twice the data rate of a Canon 5Dmk2, so far industry's best. Quality would be comparable, because of MJPEG vs. H.264.
Earlier in this thread, I had computed ~250 kB would be a good quality (*** JPEG) for a video frame image. The K20D 21 fps burst image are about 900 kB each, but compression quality hasn't been their problem
Given that a 1024p 3:2 video stream would be free of motion compression artifacts, this is very good news.
Let's hope that the K-7 1536 x 1024 mode isn't really 768 x 1024 internally (as with K20D). Or at least, that the 720p mode is a true one.
Get out of here... That's awesome. Can't wait to see this.
I'm glad I didn't ditch all my sweet pentax/m42 lenses!
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anthonybsd
Active member
I wish there was a way to "bury" posts like on digg. I'll just pretend I didn't see this, and go on my merry ways with J&R preorder for GH1 in my hands... Denial - it works.
txsbluesguy
Active member
been waiting
been waiting
too many pentax lenses to switch systems so i've been waiting ... be future only gets brighter
been waiting
too many pentax lenses to switch systems so i've been waiting ... be future only gets brighter
anthonybsd
Active member
What about autofocus, can anyone deduce any details on that?
Martti Ekstrand
Veteran
According to the swedish reseller Cyberphoto the 1536x1024 mode shoots at 20 fps.
http://www.cyberphoto.se/?info.php?article=K-7
Sorry that page is in swedish but I'm sure you can find that little tidbit anyway. Gah, no 25 fps means it's dead in the water for me, can't shoot in 50Hz practical lights with it just like the 5DmkII :huh:
The price listed without VAT is $1360 for body only (the red number includes swedish VAT).
http://www.cyberphoto.se/?info.php?article=K-7
Sorry that page is in swedish but I'm sure you can find that little tidbit anyway. Gah, no 25 fps means it's dead in the water for me, can't shoot in 50Hz practical lights with it just like the 5DmkII :huh:
The price listed without VAT is $1360 for body only (the red number includes swedish VAT).
Yes it does contrast autofocus during video capture!
Also has sensor based shake reduction...
Still unclear. But it is clear that it will allow for manual aperture control (something the 5dii lacks as I understand it). Here is a quote from a Pentax rep on the subject: [FONT=Arial, Helvetica, sans-serif]"[/FONT][FONT=Arial, Helvetica, sans-serif]i don't know that yet because we don't have the camera in hand. I would expect so[/FONT][FONT=Arial, Helvetica, sans-serif]"[/FONT]
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anthonybsd
Active member
Pardon my ignorance - but is that revealed by the description of its autofocus modes/types? In other words I'm wondering if it's a crippled bird like T1i autofocus, or full blown AF tracking in video mode.
Final Design Studios
Veteran
No 24p, no deal. It's important to my clients.
Emanuel
Cross-Examiner
This is just a fallacy. I've been around using a 5D Mark II without any flickering hassles at all. The key is all about shutter.
Emanuel
Cross-Examiner
A second one.
Maybe to your customers, not to me. 30p -> 24p is as easy as the time you can spend on it.It seems to me that this camera is everything we hate about the D90 and the MII. Why would I ever consider buying this camera? The GH-1 is closer to what we all have been lusting for and I wouldn't be surprised if Panasonic fixes most of the bugs before it hit's the US streets.
Well that's my two cents.
Well that's my two cents.
Final Design Studios
Veteran
A second one.
Maybe I should clarify, even a simulated 24P works for me. I never shoot 24pa on my DVX because everything I do is interlaced for broadcast. For me, a 60i wrapper is kinda nice.
1536 x 1024 20fps? What do we call that? I wish they'd polled the filmmaking crowd instead of just appealing to the hobbyist usergroup.
720P at a higher bitrate is good, but lens limitations and no 24P or 60P have this coming up very short. Still, more competion breeds better products.
720P at a higher bitrate is good, but lens limitations and no 24P or 60P have this coming up very short. Still, more competion breeds better products.
Sensor shift IS???
Sensor shift IS???
Sounds interesting, considering a similar system in the Oly E3 overheats in seconds... hence works only for a short preview. I think Pentax/Samsung use an electromagnetic setup, so the friction should be lower, but I'd still like to see it before I believe it. BUT if it works, it would be fantastic, IS on every legacy Pentax lens!
Jello might be well controlled, because Samsung has clearly stated that they are serious about video in their upcoming EVIL camera, so they must be working on something in this regard. OTOH, I've read somewhere it's the same sensor the K20d uses. Maybe the readout is upgraded. I remain cautiously optimistic, since as we have experienced several time, the devil is in the detail...
Sensor shift IS???
Sounds interesting, considering a similar system in the Oly E3 overheats in seconds... hence works only for a short preview. I think Pentax/Samsung use an electromagnetic setup, so the friction should be lower, but I'd still like to see it before I believe it. BUT if it works, it would be fantastic, IS on every legacy Pentax lens!
Jello might be well controlled, because Samsung has clearly stated that they are serious about video in their upcoming EVIL camera, so they must be working on something in this regard. OTOH, I've read somewhere it's the same sensor the K20d uses. Maybe the readout is upgraded. I remain cautiously optimistic, since as we have experienced several time, the devil is in the detail...