Is Epson 4870 fixed-intensity scanner?

[Steven Woody]

i heard many non-professional scanners use fixed-intensity fluorescent
tubes, that means user can not really control the the scanner's
hardware exposure. is Epson's 4870 scanner fall in this class?
thanks.

-
woody

 

[Roger S.]

Exposure isn't just intensity of light, it's also length of time.
Doubling time= doubling light.

 

[Steven Woody]

Exposure isn't just intensity of light, it's also length of time.
Doubling time= doubling light.

ok, any way, does the epson 4870 scanner support changing of exposure?
supposing the software interface support it.

-
woody