The sensor is 29.4mm x 18.9mm = 555.66mm^2. An FF sensor is 36mm x 24mm = 864mm^2. (864 / 555.66) * 250MP = 388.7MP
Just wondering - how many photographers need that much? How much would lenses capable of resolving >300MP cost?
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I might be able to help on that question. The company I consult to (i.e. as a personal favour to its owner!), has manufactured at its Vancouver Canada facility, the worlds LARGEST CMOS 64-bit RGBA colour AND Greyscale imager chip on a 400 mm wafer (i.e. also the world's largest single-piece silicon wafer at 400+ mm) at a final resolution of 131,072 by 131,072 pixels (i.e. 128k resolution 1:1 aspect ratio) usually used in satellite Optical-band and IR/UV band imaging!
EACH one of those chips is about THREE MILLION USD (i.e. 4 million Canadian dollars) and the 4800 mm super-telephoto Acrylic lens assembly (i.e. coated high refractive index plastic lenses!) is around $1.5 million USD to 3D-XYZ CNC-machine and assemble in Vancouver.
Soooo, for Canon's 250 megapixel+ APS-H sensors, I am saying around $150,000 for the custom chips and lenses that are SHARP ENOUGH to resolve those megapixels. Think of them as being special versions of Zeiss/Arri Master Primes which are about $240,000 US per set.
Those costs are mostly for the PERSONNEL TIME required to monitor manufacturing processes for quality control and due to specialty optical measurements/instruments. Again, for lenses past 200 megapixels on APS-H or smaller sensor sizes, the resolving power of glass lenses NEEDS ultra high precision and superb quality control so an 85 mm prime lens is probably around $50,000 to $75,000 USD and an 800 mm or longer telephoto prime would likely be in the neighbourhood of $150,000 USD and above!
Of course with MASS production (10,000 units or greater!), you could get those lenses down to about $5500 USD each for the 85 mm prime and maybe $15,000 USD for the 800mm telephoto designed for a 250 megapixel APS-H sensor. It depends upon the amount of automation on the Quality Control side of things. If they could automate it fully at high precision, prices could really drop!
I would also say that mostly landscape and luxury product photographers use that type of resolution. A high end Hasselblad and/or Phase One camera can do pixel-shifted 200+ megapixel shots and I personally know eight of them just in the Vancouver/Whistler, Canada area who do that type of luxury products photography and they tend to buy new gear on lease payments every 3 or 4 years.
Extrapolate that to 5000 such artists worldwide, you are looking at maybe a 25 million dollars in revenue per year for manufacturers. Engineering Design companies would maybe buy 10x that per year that many so maybe about $250 million USD in revenue for such super high end gear manufacturers. NATO Militaries and Space Imaging centres tend to buy the MOST of such high end lenses and CMOS sensor gear so maybe another $750 million to $1.5 Billion USD in revenue per year split amongst multiple companies so basically NOTHING compared to the revenue created by just the consumer-level Canon M50 and Powershot series or Sony A7 series cameras which are the BIG moneymakers for manufacturers!
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V