I recently acquired an Epson v750 scanner and am trying to find the optimum height of the film holders.

To that end, I have scanned the same image (4 x 5 bw negative) @ each of the 3 levels of the Epson film holder.

Each scan was identical in process, in that I used Epson Scan, set the output levels @ 0 - 255, set the resolution at 2400 dpi and used no sharpening.

I printed each image (an 8 x 10 detail from the scan) in Lightroom on Red River Ultra-pro Satin using Eric Chan's ABW profile for this paper. The print was done on an Epson 3880 @ 360 dpi with no enlargement needed.

I was anticipating differences in the apparent sharpness of the prints, but even using a magnifying glass, I cannot perceive any distinction between the 3 prints.

I am hoping to get input on the following:
1. Should I see obvious differences in the apparent resolution of the 3 prints?
2. If the answer to #1 is 'yes' then what might I be missing in my workflow that prevents me from observing differences in apparent resolution?

Thanks for any info you can provide