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.
05-28-2019 01:30 PM
05-28-2019 01:51 PM - edited 05-28-2019 01:53 PM
A 24-70 will have the same field of view no matter whether it is EF or EF-S. The visible field of view will be narrower on an APS-C sensored camera.
05-28-2019 02:02 PM
So, I take your response to mean that the images, taken at the stated length of 70mm, for both the EF and EF-S lenses, will be indistinguishable. That the EF-S, despite not throwing away any image circle, will have its image "cropped" as much as the EF. Makes no sense to me.
05-28-2019 02:38 PM
On an optical bench they are indistinguishable. In a real camera, there is a difference.
The FF camera will have a field of view of 35 degrees
The APS-C camera will have a fov of 22 degrees.
A 70 mm EF-S lens does indeed "throw away" image circle. What makes you think it doesn't?
05-28-2019 02:44 PM
Just to add to my own reply:
The new Fuji MF camera would have a 46 degree FOV with a 70 mm lens. So if you compared this camera with an EF FF camera you could also say that the 70 mm lens on a FF camera "throws away" image circle compared to MF.
05-28-2019 04:00 PM
"Canon EF-S lenses have a smaller image circle that is only big enough to cover the smaller sensor found on Canon APS-C cameras."
If this is true, then there is nothing being thrown away, in the sense that a smaller sensor would throw away a portion of the EF lens's image circle.
05-28-2019 04:08 PM - edited 05-28-2019 04:10 PM
The question I asked did not relate to differences between APS-C vs FF cameras. It was about EF-S vs EF lenses with the same focal length dialed in and on the same APS-C camera, identically placed, seeing the exact same subject. Are the resulting images different?
Sorry if I appear to be obtuse. This entire discussion has gone off into the technical weeds on bunny trails several times, where the essential question is simple.