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by Jon

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1

Besides the cost of making the sensor larger, consider also that it will need a larger (and heavier) mirror, a larger pentaprism, and therefore a larger body. All this maintaining equal or higher construction standards, since full frame users spend more and thus expect more. Also, typically FF cameras sell less units, therefore the costs for engineering the ...


4

In the "Canon's Full-Frame CMOS Sensors" whitepaper, dated August 2006, you can read the following, which kind of answers your question, although the manufacturing technology and the costs have probably changed to some degree since 2006: Thin disks of silicon called “wafers” are used as the raw material of semiconductor manufacturing. Depending upon its ...


2

The cost of manufacturing the larger chips is not simply the difference in the surface area of the two sensor sizes. This is the case due to the rejection rates of each for the same number of defects on a wafer from which the chips are cut. Assuming an APS-C sensor is 44% the surface area of a FF chip (Nikon, Sony, etc. Canon APS-C is slightly smaller at ...


1

Some more things that can limit what's practical to below what can be manufactured: weight (of the resulting system). A very large sensor needs a very large image circle, which means large lenses, and a large camera. power consumption. A large sensor needs more power than a small one, thus battery life is decreased (unless you again increase the size and ...


23

You can make some very large CCDs. An older press release talks of a CCD that was made for the US Naval Observatory that is 4" x 4" and 10,560 pixels x 10,560 pixels. Thats 111 megapixels on one sensor. Thats kind of not small. (From above press release) The first restriction that the sensor has is that it must be a single wafer of silicon, and thats ...


10

The largest CMOS sensors available commercially for photography are "medium format" and measure about 44mm x 33mm. CCDs exist in slightly larger sizes up to 54mm x 40mm. Larger sensors for scientific applications may have been produced. Sensors are produced by projecting a mask onto a large wafer of silicon using UV light. The wafer is then cut into ...


3

There are even bigger sensors. If you look closely to the image in the top-right corner of that page you'll see that the biggest sensor there is 'Medium Format Kodak KAF' sensor. Ok, I understand that it isn't quite easy to figure this out because one can easily take that the background of that image is gray while in reality the image has a white ...



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