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Post by Dragon Man on Nov 16, 2013 15:28:47 GMT
Here's the type of 'Live' view you get from a Samsung SCB-4000 (SCC-A2333) Security Camera with the IR filter removed.
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Post by Dragon Man on Nov 16, 2013 15:31:14 GMT
. . and this is how the Venus Transit appeared 'Live' using a 'White' Glass Solar Filter.
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Post by davy on Nov 16, 2013 16:46:39 GMT
ken.. have to ask,,was it a change of setting's to get the first image from that nice orange glow to the warm yellow..davy
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Post by Dragon Man on Nov 18, 2013 10:13:58 GMT
Yes davy. I think I changed from 1/100th sec to 1/50th or something similar.
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Post by johnno on Nov 18, 2013 22:53:51 GMT
4000 looks to give good resolution compared to a 2000
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Post by Dragon Man on Nov 19, 2013 4:03:56 GMT
Yes John, the 2000 has a 1/3" Super HAD chip. Whereas the 4000 has a 1/2" Ex-view HAD chip.
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Post by Deleted on Nov 19, 2013 11:23:24 GMT
ive read that the new plastic 1/3" Exview chips out perform the older 1/2" ones as the technology has advanced and that the 1/2" chips are not even made anymore. That true?
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Post by Dragon Man on Nov 19, 2013 14:54:29 GMT
Chris, The new 1/3" chip may have good resolution or sensitivity or whatever they want to claim, but it is plastic. And that rules out Cooling it. Which also limits integration times. Plastic chips cannot be cooled. Well, they can, if you want them to de-laminate I should say they shouldn't be cooled, which rules out any serious work with them. The 1/2" Ex-view chips are still made by Sony. Otherwise people like Rock Mallin of Mallincam would instantly go into panic mode! His top of the range cameras use them and he has a contract with Sony to be supplied with Class 0 and Class 1 chips. The ceramic Class 0 and Class 1 Ex-View and Super HAD chips used in Mallincams are Scientific Grade, and used in high numbers for Scientific cameras (chemistry, forensics, biological research labs, infectious diseases research, etc). So for now, they are still made.
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Post by Deleted on Nov 19, 2013 21:41:21 GMT
Ahhh ok cheers Ken so with the new technology comes a serious downside. Thinking back it may have been something like "cctv cameras are not made with them anymore". So they are still produced then thats good. Im guessing crazy prices for these chips and thats reflected in the price of the mallincams. But how does this compare with the scb4000 chips? are they Class 0 or 1? Maybe we could start a new thread all about the difference in chips. Mcdonalds chips dont count tho!
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Post by Dragon Man on Nov 20, 2013 5:44:45 GMT
The sensors used in standard run-of-the-mill CCTV cameras are often Class 6 or un-classed mass produced plastic sensors. Sony and Kodak pump out millions of these sensors for the consumer market in CCTV cameras, low-end video cameras, happy snap cameras, etc.
Even SBIG use Class 1 and 2 sensors, but not Class 0 as they are very hard to get. Yet Rock has a contract to get them. The hard part about getting Class 0 chips is that they are harder to make and cost a lot more to make. They are classified as absolutely faultless, no hot pixels, no warm pixels, and no dead pixels.
They are a ceramic base, not plastic, and are manufactured in a separate room away from the mass-produced versions.
Class 1 will allow up to 100 major affected pixels, Class 2 - 200 pixels, and so on, Class 1 will allow up to 1000 minor affected pixels, Class 2 - 2000 etc etc. SBIG charge as much as $2000 difference between the Class 1 & 2 sensors in the same camera.
There are other factors that define the Class of chip like Column defects etc. Class 0 has No defects, and that is rare, hence why they cost so much.
High end Video cameras like those used for TV news use Class 1, TV production use Class 0 or 1.
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Post by Deleted on Nov 20, 2013 10:06:16 GMT
Cheers Ken! Excellent technical info as usuall Helps me understand the whole thning much better.
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