Alternatives to SI and Sumix - Page 4 at DVinfo.net

Go Back   DV Info Net > Special Interest Areas > Alternative Imaging Methods

Alternative Imaging Methods
DV Info Net is the birthplace of all 35mm adapters.


Reply
 
Thread Tools Search this Thread
Old January 5th, 2005, 05:40 PM   #46
Major Player
 
Join Date: Mar 2004
Location: Melbourne, Australia
Posts: 223
Thank you for the reply. This is part of the message I received fromPixelink:

"..._The lens used for these images was an inexpensive C-mount lens that does not have any correction for_chromatic aberrations. With a high resolving power, the Bayer artifacts become more noticeable._ As the lens resolving power is reduced (or the focus moved away from the ideal) the Bayer artifacts go away..."

Imagine what will happen if you shoot with Zeiss Digiprimes or Cooke S4!
I will talk to a tech from the local distributor today and try to pick his brain.
Valeriu Campan is offline   Reply With Quote
Old January 5th, 2005, 10:56 PM   #47
Inner Circle
 
Join Date: May 2003
Location: Australia
Posts: 2,761
<<<-- Originally posted by John Nagle : Wayne,

Just wanted to check that link for smallcamera.com, I followed it and there is only a site under construction -->>>

Sorry about that John, it is actually http://www.smalcamera.com/ with one L.

I'm just chucking this in here, I think with a bit of co-op work they might come to the table, but still you can check the links to the sample images etc in my technical thread. I don't think it is the most brilliant sensor, but excellent as a cheap alternative to Altasens/Ibis5a.

Now the Ibis5a is supposed to use a special pad around it's sensor to collect stray light that misses the sensor, without using a microlense (which redices the maxiumnum aperature that canbe used). I think it was also to recude niose, but still people says it needs lots of light, strange marketing technology. I wonder what it actually does. Out of curiousity are the images dull in color, or just washed out in lower light levels?

Re-edit: Just had a look at some of the sensor specs again, rolling shutter, but enough data rate to run higher shutter (but calculations for region of interest regioning max shutter not made clear). Again this is a good sensor for a cheap (even doco special) camera, not Altasens quality. There is hidden (somewhere) their 1920 wide security camera (which would need two on a split prism), but seriously they have there own sensor designs and produce there own cameras, they would have a lot of designs they could make hidden from the public.

Thanks.
Wayne Morellini is offline   Reply With Quote
Old February 1st, 2005, 06:54 AM   #48
Tourist
 
Join Date: Dec 2004
Location: Fort Wayne Indiana
Posts: 2
Hd Alternatives

Check Out the Basler 622f camera, Who knows it might be the one used in the Drake(Just a Guess)
__________________
Lester Mclewis
Lester Mclewis is offline   Reply With Quote
Old February 1st, 2005, 09:21 AM   #49
Silicon Imaging, Inc.
 
Join Date: May 2004
Location: Troy, NY USA
Posts: 325
Lester,
The Basler is an IBIS-5A again. You can tell from: 6.7 micron pitch, CMOS, global shutter, 1.3Mpix, 24fps.

Wayne,
The IBIS-5A has some adjacent pixel smearing which ruins the color purity.
__________________
Silicon Imaging, Inc.
We see the Light!
http://www.siliconimaging.com
Steve Nordhauser is offline   Reply With Quote
Old February 1st, 2005, 04:34 PM   #50
Tourist
 
Join Date: Oct 2004
Location: White Plains, NY
Posts: 1
mono

Anybody know how the mono version of the IBIS-5A performs?

It seems that most of the complaints about this chip are related to color.

Also, in general, I am curious how a bayer filtered color image that has been converted to grayscale differs visually from one captured in monochrome.
Jon Schroth is offline   Reply With Quote
Old February 1st, 2005, 07:21 PM   #51
Regular Crew
 
Join Date: Dec 2003
Location: San Luis Obispo, CA
Posts: 38
Hey guys, sorry if i'm a bit behind the curve on this, but i've been reading on the technical disscussion thread and concerning the SI-1920HD; what would be the difference in going with this cam vs. the SI-3300M. I know that the 1920 is a 2/3" chip at 2 mpixel and the 3300 has a 1/2" chip at 3 mpixel. Is there a significant difference in resolution, pic quality, or light latitude? Wouldnt the 3300 @ 3mpixel be output a better image or does the larger chip on the 1920 make that big of a difference? Just wondering what would be the better cam to go with in putting together an HD camera setup. Thanks, Omar
Omar Saad is offline   Reply With Quote
Old February 2nd, 2005, 08:22 AM   #52
Silicon Imaging, Inc.
 
Join Date: May 2004
Location: Troy, NY USA
Posts: 325
Jon,
We sell the SI-1280F (IBIS-5A) in mono and color. You will get the best mono image with a mono sensor. The IBIS-5A is already not too sensitive - you toss over half the light with a Bayer filter. You also do not get an even spectral response at every pixel. For example, a pure red object will show up on 25% of the pixels of a color sensor - you lost spatial resolution. It will show up on all the pixels of a mono sensor.

Omar,
The SI-3300 has smaller pixels (3.2 microns vs 5.0 on the SI-1920HD) so it is less light sensitive. It also has a max clocking rate of about 60Mpixels/sec (24fps) where the SI-1920HD can do 150Mpix/sec. This allows faster readout so you can minimize rolling shutter artifacts, even at a frame rate of 24fps. As you said, the larger sensor gives you a shallower DOF. Both are low noise sensors, the 1920HD is better. The SI-3300 is viable for a camera, especially for the cost differential.
__________________
Silicon Imaging, Inc.
We see the Light!
http://www.siliconimaging.com
Steve Nordhauser is offline   Reply With Quote
Old February 2nd, 2005, 10:44 AM   #53
Inner Circle
 
Join Date: May 2003
Location: Australia
Posts: 2,761
<<<-- Originally posted by Steve Nordhauser :
Wayne,
The IBIS-5A has some adjacent pixel smearing which ruins the color purity. -->>>

There is allways something ;) Are the high speed versions of the IBIS and Micron 1.3MP a viable cheaper camera to the Altasens? Say, could you make a camera for $1-2K out of them? Their architectures are far superior to the IBIS and micron (global shutter aren't they).

Now my question on the other thread, you mentioned a memory buffered GIGE camera, I believe, sometime ago, when is that coming? It will be interesting to see the tests when they start rolling in of the new cameras.
Wayne Morellini is offline   Reply With Quote
Old February 15th, 2005, 01:14 AM   #54
 
Join Date: May 2004
Location: denton, texas, usa
Posts: 416
Well,

I love you guys who all tried, but as I predicted, it looks like it's all going to be way too late.

STRONG rumors suggest a Panasonic DVCProHD camera coming out for under 10 k some time this year. NAB will most likely unleash it. Records to mini-dv and also P2. The quality won't meet the "uncompressed" richness of what you guys have been trying for, but for cost-effectiveness, and rock-solid reliability, and user-friendliness, the trade off will be well worth it.

Sorry guys, I think they beat you to the punch.

. . . like I predicted.

Elvis has left the building.
Laurence Maher is offline   Reply With Quote
Old February 15th, 2005, 02:13 AM   #55
Inner Circle
 
Join Date: May 2003
Location: Australia
Posts: 2,761
Well you would be better going for the FX1 through component output. Now there is no gaurantee you won't be able to do this through the Pana, but maybe Juan will offer a RAW solution for it. But seriously, without these, even the IBIS and Micron RAW are still worh looking at. It is all a compromise between price, features, performance and convience, which you would like.
Wayne Morellini is offline   Reply With Quote
Old February 15th, 2005, 07:54 AM   #56
Regular Crew
 
Join Date: Jun 2004
Location: Germany
Posts: 136
<<<-- Originally posted by Laurence Maher : Well,

I love you guys who all tried, but as I predicted, it looks like it's all going to be way too late.

STRONG rumors suggest a Panasonic DVCProHD camera coming out for under 10 k some time this year. NAB will most likely unleash it. Records to mini-dv and also P2. The quality won't meet the "uncompressed" richness of what you guys have been trying for, but for cost-effectiveness, and rock-solid reliability, and user-friendliness, the trade off will be well worth it.

Sorry guys, I think they beat you to the punch.
-->>>

NO! This will be just another DV Toy. No DOF, together with extrem compression. Just home made video pur. No, no. Let others play with those "kindergarten" things...
Rai Orz is offline   Reply With Quote
Old February 15th, 2005, 10:48 AM   #57
Major Player
 
Join Date: Jun 2004
Location: Houston, TX
Posts: 356
<<<-- Originally posted by Rai Orz : NO! This will be just another DV Toy. No DOF, together with extrem compression. Just home made video pur. No, no. Let others play with those "kindergarten" things... -->>>

Anything recording to 100mbs DVCProHD is not a DV toy. It's not uncompressed video, but you can get great professional images out of DVCProHD.
Joshua Starnes is offline   Reply With Quote
Old February 15th, 2005, 11:48 AM   #58
Major Player
 
Join Date: Jul 2004
Posts: 587
Indeed. The Varicam has been used on some very, very high end stuff and it uses DVCproHD. This isn't a lightweight format.

That said, it isn't an uncompressed camera. The market is absolutely still there.
Aaron Shaw is offline   Reply With Quote
Old February 15th, 2005, 11:50 AM   #59
Regular Crew
 
Join Date: Jun 2004
Location: Germany
Posts: 136
Do you realy think the big companys bring out a realy good HD camera under 10 k ? Why? HDTV okay, but wait for the downsides (small sensors, compression artefacts, etc.)
Rai Orz is offline   Reply With Quote
Old February 15th, 2005, 11:57 AM   #60
Major Player
 
Join Date: Jul 2004
Posts: 587
Oh I'm not saying it will replace your camera. Far from it. I'm just saying that it's an interesting option.
Aaron Shaw is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Special Interest Areas > Alternative Imaging Methods

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 03:10 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network