Originally posted by Pål Jensen You can bump the ISO on the APS camera as well. The image quality differences are the differences inherited in the formats; this can't be "equalized" if you want to compare apples with apples as opposed to oranges.
In addition the differences in DOF is about one stop; usually not even visible. The idea that the constant is DOF wide open as the benchmark for comparison is nothing less than silly as thin DOF wide open is a problem for 99,999% of images ever taken, and again I'm not exagregating, whereas cost, size and shutterspeed is not unimportant.
APS have several advantages over FF just like FF have several advantages over medium format. What you gain with larger format is image quality. Theres nothing magical about 35mm.
The fact is that more DOF at the same numerical aperture is a bonus for the vast majority of shooting situations (that is also one of the advantages 35mm has over medium format). Claiming otherwise is to make the weird the norm.
99.999%? When you first started this campaign against reason you claimed it was 99%. What happened - recount, hanging chads? Your argument is just plain silly regardless of the percentage you choose to insert there. Let me illustrate. Since 92.638% (if you can make up bogus stats, so can I) of prints are 8 X 10 or smaller, there is no use for a printer that prints up to 11 x 17. 94.310% of hand drawn pictures are done by crayon and hung on a refrigerator. There is absolutely no reason for anyone to ever buy fine oil paints, or chalk, or make a frame, or go to a museum.
The point is the chosen medium is useful and pleasing to *some* people *some* of the time. I like looking at photos where the subject appears completely in focus. I am also inspired and motivated by many photos that show a shallow depth of field which is impossible to produce using APSC format. For *me* the percentage of pictures in that second category is much higher than 0.001%.
If your intent with these posts is to convince people that they really don't like what they claim to like, I don't see that many are convinced. On the other hand, if your intent is to convince people that you are biologically incapable of grasping that someone else's aesthetic preferences are different than yours, keep on posting - I think you are succeeding beyond your wildest dreams.
Your insistence that no one should ever use that 1 stop extra of narrow DOF on a FF camera seemingly leads you to employ the most convoluted arguments to try and refute the concept of lens equivalence (nothing more or less than the mathematical relationship between aperture, FOV and sensor size), and that's not helping your cause.