I'm going to be having my father's slides digitized, and am unsure what the optimal resolution should be. I had assumed that the highest available resolution would be best, but the manager of the place where I'm having it done claims that ultra-high resolution scans would exceed the resolution of slide film and expose and exaggerate imperfections, thereby yielding inferior results compared to scans done at more modest resolutions. (The cost per slide will be the same regardless of the output resolution.) Almost all of my dad's slides are Kodachrome. They were shot between the late 1960's and late 70's with his Minolta SRT-101 and Rokkor lenses, and are well exposed and in remarkably good condition, having been stored in cool, dry, dark conditions. I will be sharing most of the photos online and on computer via DVD or flash drive, but would like the option of being able to make fairly large prints of some of them. But, even more importantly, since my main motivation for the project is to archive part of my family history, I don't want to later regret that I chose a sub-optimal resolution. So, in a nutshell, which output resolution(s) would be optimal for my purposes?