This is another LiDE winner from Canon.

The CanoScan LiDE 500F is complete extrovert being the only CIS scanner, enabling it to be a space-age ultra low profile design and have no need for a mains power supply as it’s powered entirely via the USB port….

The CanoScan LiDE 500F is complete extrovert and unlike any other model in this group test. For a start, it’s the only CIS scanner, enabling it to be a space-age ultra low profile design and have no need for a mains power supply as it’s powered entirely via the USB port. But it can also be turned on its spine and operated like an up-turned book, saving space on your desk. It not only looks good, but the LiDE500F is also a good performer, with sharp, punchy results. The only caveat is some stepping of straight line detail in film scans.
The film scanner arrangement involves mounting a separate combined transparency illuminator and film holder. It’s neat, but there is only space for scanning one film frame or mounted slide at a time.
Canon’s FARE Level 3 system in the LiDE500 was also more effective than Digital ICE in the Epson 4490 and only extended film scan times at 2400ppi from 76 seconds to 98 seconds.