How important is color bit depth?
This isn’t as important as the other factors mentioned here. Bit depth tells you many bits are used to represent each pixel. Theoretically, a 30-bit scanner should yield superior images than a 24-bit scanner, but many software programs won’t pick up more than 24 bits per pixel so you won’t notice a difference. However, you probably want a 36-bit scanner if you work with graphic-intensive images because high-end software programs will support 36 bits. Also, a 36-bit scanner generally has superior components to a 30-bit scanner, which has superior components to a 24-bit scanner.