03-13-2019 12:20 PM
It was too expensive to jump right to full frame sensors, so Canon took the intermediate step of APS-H."
Makes you wonder how the 1Ds (first FF) ever got built? Released less than a year after the 1D with its H sensor. As I recall the 1D was $6999 and the 1Ds was $7999 so it did cost more but not so much as a percentage of the total coat.
03-13-2019 01:29 PM
They might have learned how to improve the yield with the APS-H so much that it was only a $1000 adder for the Full frame.
The area increased 67% from APS-C to APS-H and another 58% from APS-H to FF- so not quite as big a jump. They might also have caught a lucky break with an increase of wafer size. Silicon wafers have increased in size from about 4" to 12". With each step, you have to change all the tools in the fab to handle the new size. With a larger wafer, even if the yield (defects/mm^2) stays the same, you get a lot more sensors so you are likely to get more per wafer.