Canon's 2001 prosumer compact flagship — 4.1MP CCD, 3x 35-105mm f/2.8-4.9, RAW and manual modes, CompactFlash.
The PowerShot S40 arrived in October 2001 as the flagship of Canon's newly prosumer S-series, sharing the redesigned metal body, manual controls and RAW support introduced by the PowerShot S30 a month earlier but with a higher-resolution sensor. It slotted beneath the G-series as the compact enthusiast choice and was succeeded by the DIGIC-equipped S45 a year later.
It paired a 4.1-megapixel 1/1.8-inch CCD, a leading pixel count for a compact in 2001, with the same 3x optical zoom covering 35-105mm equivalent at f/2.8-4.9 behind a sliding lens cover. Full manual exposure and RAW capture headlined the feature set, with 320x240 15fps video, a 1.8-inch LCD, optical viewfinder and CompactFlash storage.
For collectors of early enthusiast digicams the S40 is the higher-resolution pick of the 2001 pair, delivering usable A4 prints from a pocketable body with proper controls. It shares the S30's slow video and deliberate pace, and the small lens is best in decent light.
As with the S30, verify the sliding cover-cum-power-switch operates smoothly, budget for a small CompactFlash card, and confirm a charged proprietary battery and charger are included since original cells are now old. Test RAW and JPEG capture and inspect frames for the streaks or colour casts that can develop in ageing CCDs.