Which specific cameras (Brand/Model) have a DOF button that actuates the iris and is NOT just an electronic function?
I used the DOF and split screen focus extensively shooting 35MM. I don't have good enough eyesight to use the LED preview screen to comfortably compose and check DOF and other particulars.
I'm having a heck of a time figuring this out, as we don't have any camera shops left in Memphis, TN.
actuates the iris and is NOT just an electronic function
? The EF-mount on Canon-bodies does all things electronically, including the aperture control. Do you mean that it should not simulate (as in: not actually closing the aperture, but "computing" some DOF) the aperture? If so: I never heard of any camera that would do sucha very complex task. \$\endgroup\$