Questions about Reflecta ProScan 10T

I am currently scanning negatives and have measured the following (resolution 3000ppi, 8 bit colour depth): Scan duration (without prescan) incl. storage: 2'25" at 4170x2809 pixels = 11.7 MP 2'26" at 4191x2824 pixels = 11.8 MP 2'25" at 4151x2824 Pixel = 11.7 MP I use Silverfast SE Plus as software and am extremely satisfied with it. Generally very happy with the ProScan 10T, previously had the Nikon Coolscan 4000ED until it went out of production (second-hand model).

There are 2 holders included, one for slides and one for negatives (6x).