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What is a 500W HD camera and how can it be 500 million pixels?

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edy:
I found a link to a camera that has both 300W and 500W options. I can't translate the text properly so I am not sure if it says what the difference is, but perhaps this gives some clues:

http://www.newbecca.com/product/42953603959

Here's another interesting example of a Drone Toy which includes 500w in the description, yet under the "color classification" specs later it mentions 30w and then 200w:

https://www.amazon.ca/Headless-Routing-Real-Time-Transmission-Pressure/dp/B08727X4RY

Trying not to overthink this but seems strange that it would be included in so many descriptions. Assuming it has nothing to do with a spec, perhaps it is some chip/sensor model number that is being sourced for these various cameras. I did find this answer on Amazon to some 200w item:


--- Quote ---200W=200WAN(Chinese) means 2MP. Thanks.

Imake Seller · May 3, 2015
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This is the resolution of the camera which is 200 pixels wide. The higher the pixels, the better the detail in the images.

Daniel G. · May 2, 2015
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It's a 2 megapixil cam or 2 million pixels was the way I read it just got mine I'm learning to fly
--- End quote ---

So I had a look at Wan meaning in Chinese:


--- Quote ---What number is Wan in Chinese?
万(wàn): ten thousand.
--- End quote ---

If w=10,000, then 500w = 500 x 10,000 = 5,000,000 or 5 MP. BINGO!  :-+

Obviously 5MP is a far cry from 500,000,000 (500 MP) but makes more sense. A 5MP camera would be resolution of about 2592 x 1944, certainly better than a 1080p (2.1MP) camera (assuming they are actually using this and not faking the resolution or specs). We'll find out in a few weeks, the company says it will be ready then (not holding my breath). Still not happy their website is claiming 500 million pixels but this could be an *honest* translation error (just like "w" meaning 10,000 maybe they thought in English it means million). It makes for some interesting financial transactions... did you say 10,000 in change? Ok, here's a million.  :-DD

SiliconWizard:
5MP sensors are nothing special these days.
Some smartphones now have 48MP sensors (and maybe even up to 108MP I think.) Doesn't mean they are really worth it, but the pixels are there.

That's still an order of magnitude from the 500MP mark.
Samsung has announced something like this: https://www.techradar.com/news/samsung-working-on-camera-sensors-that-bests-the-human-eye

The product is not there though and you'd never find any camera with something like this at this price point. It's not just the sensor; it would require very powerful image processing chips to make any use of them, and an enormous amount of storage.

Someone:

--- Quote from: Siwastaja on November 09, 2021, 09:22:52 am ---
--- Quote from: Someone on November 09, 2021, 12:55:30 am ---You can pipe a broadcast lens (B4-mount etc) to arbitrary sensors
--- End quote ---
Of course you can but then you are just using part of the sensor area, and the end result is equivalent to using the smaller sensor (one meant for the lens!) to begin with.
--- End quote ---
FFS, how clearly do I have to say this:

--- Quote from: Someone on November 09, 2021, 12:55:30 am ---You can pipe a broadcast lens (B4-mount etc) to arbitrary sensors, with some fancy optics as I specifically mentioned. Either 3 chip or single sensor needs some optical processing to make it all work properly, and then along the way though [optical processing block] the image on the sensor can be scaled to match the lens interface specification.
--- End quote ---
No matter if its singe or 3x sensor, there is a pile of optical processing sitting between a "broadcast" B4 lens and the sensor(s). In some products that includes scaling of the image to fit in a larger or smaller optical format sensor. At that point the choice of image sensor/pixel size is relatively open.


--- Quote from: Zero999 on November 09, 2021, 12:15:34 pm ---How small can the pixels be? I would have thought that diffraction would limit the smallest pixel size to half the wavelength of the longest wavelength of light it needs to respond to. Assuming that would be 700nm, the pixels can be no smaller than 350nm, so a 500M pixel CCD would need to be larger than 350×10-9√(500×106) = 7.83mm by 7.83mm.
--- End quote ---
Light needs some depth to be absorbed as there are boundary/surface effects in the materials. Add some other material to keep light from spilling into neighbouring pixels and it gets hard to make things smaller than the 700nm pixels currently state of the art:
https://www.techinsights.com/blog/part-2-pixel-scaling-and-scaling-enablers

Siwastaja:
I don't like to discuss with people who are so angry and curse with no reason, but I'll let it slip this time.

Optical scaling between lens mount and sensor, to magnify the image to fit larger sensor? Really?

Of course it's doable. Not saying this isn't possible, but it's going to be a huge compromise and will never work as well as a lens designed for the sensor size.

Any references of such system?

Someone:

--- Quote from: Siwastaja on November 10, 2021, 08:47:40 am ---Optical scaling between lens mount and sensor, to magnify the image to fit larger sensor? Really?

Of course it's doable. Not saying this isn't possible, but it's going to be a huge compromise and will never work as well as a lens designed for the sensor size.

Any references of such system?
--- End quote ---
Its not just possible but relatively common, and well documented/publicized. Yet you came in with nothing more than an outright refusal that it was even possible, you didn't concede it was impractical or doable. Instead took a quote out of the explicit explanation that there are optics involved (only the crappiest of B4 mount cameras would be direct to sensor as the lenses arent designed for that use) and said it would have to be a fixed image size.

So since you cant even do the most basic of research before claiming you know about a field (which clearly the commentators in here don't know much beyond a cursory glance), here is a screenshot from the Panasonic AK-UC3300GJ brochure.

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