Frank Arthur wrote:

Astounding! 30mp from your Canoscan
What amazing resolution from your scanner!?


A 35mm slide is 36 mm x 24 mm.

Convert to inches 36/25.4 = 1.417322835 Use 1.4 inches for long side
Convert to inches 24/25.4 = 0.945 inches (rounded) for short side.

Scan at 4800 dpi you get

0.945 * 4800 = 4536 pixels
1.4 * 4800 = 6720 pixels.

Megapixels is 4536 * 6720 = 30481920 pixels or 30.48 Megapixels.