Doug,
Just to make sure I have this right, to scan a 35mm slide (or negative) with enough resolution to print a 13 by 19 inch photo, I would need to scan at about 4000 ppi to get about a 16 Mpixel image (I have rounded off the conversions a bit). At full color and TIF that will be one big file.
Of course all of the above assumes the original image was of high enough quality to support such a scan. Oh, and all bets are off if you want to crop that baby.
Catia
After reading your review again, I see you have scanned 35mm at 3200ppi. So for the .945 inch by 1.427 inch image area on the 35 mm slide that is 3024 by 4534 pixels or 13.71 Mega pixels. At 300 dpi that is enough pixels for a 10 by 13.4 print. Hmmm, just rambling and doing the math.