Isn't it wide open metering a simpler solution?Right, but with K- and M-lenses you need an aperture simulator coupling ring to be able to have that. Without such ring (and I already accept the absence of it on the *ist D as a fact) you can have metering only for the maximum aperture (as implemented in *ist and *ist D) or with the lens stopped down.
Theres an exposure bar in the finder; if you set the aperture three stop from wide open, just dial in +3. Simple.Are you going to dial in + 7 for f16 with the M50/f1.4?
I fear that a camera manufacturer who release a camera where you have to activate the DOF preview before metering and then note the exposure, switch to manual exposure and then dial it in, will be promptly laughed out of business.I never suggested such scheme. I am under the impression that you don't really care to understand what I write. I suggested a much simpler scheme: Plain stop down metering. Let me repeat:
Provided that you have any lens that is not in "A" position the meter wouldn't work until DOF preview would be activated. In manual mode there would then be the bar showing over- or underexposure. In aperture priotity mode, the metered value could be locked when DOF preview would be left. That's all. No switching between modes would be required.
However, the way the *ist D is now it will really be laughed at: When using a K lens, you need to measure the time that the camera would choose for maximum aperture. Then one needs to calculate the correct time for the chosen aperture, swtich to manual mode and dial in the calculated time. That is ridiculous, it is hilarious.
In fact, the current solution with wide open metering would be faster and simpler in use.Only in another universe.
Arnold
