Mark Ci , Jun 13, 2004; 01:29 p.m.
I have no idea what you've posted for the Powershot. Looks like meaningless gibberish.
A full specification for a lighting level includes an EV value plus an ISO. Sometimes the ISO is assumed to be ISO 100 and omitted.
Since a faster lens gathers more light, you need to include this as well as EV/ISO. So a full specification for AF sensitivity would be something like EV 1 @ISO 100 (f/1.4).