Pentax's 2004 slim AA-powered compact — 3.2MP 1/2.7-inch CCD, 3x 38-114mm equiv f/2.6-4.8 zoom, SD storage.
The Pentax Optio S30 was a slim entry-level digital compact announced in March 2004, an AA-powered relative of the credit-card-sized Optio S models that traded the S line's tiny lithium pack for everyday batteries. It sat near the bottom of the Optio range, above only the most basic models, and is distinct from the similarly named Optio 30 and Optio S3.
Behind the 3x optical zoom — 38-114mm equivalent at f/2.6-4.8 — sits a 3.2-megapixel 1/2.7-inch interline-transfer CCD with a primary colour filter, producing images up to 2048x1536 pixels. The 1.6-inch LCD is joined by a real optical viewfinder-era feature set including histogram display, selectable ISO from 50 to 400, continuous shooting and timelapse movie modes. Storage is SD card, connectivity USB 1.1, and it runs on readily available AA cells (CR-V3 compatible). It measures 89x59x26mm and weighs about 175g.
Three megapixels is modest, but the S30 delivers the early-CCD colour signature that draws digicam collectors, in a genuinely shirt-pocketable AA-powered body. It suits students and beginners experimenting with y2k-era digital aesthetics on a small budget; low light is not its territory with ISO capped at 400.
Check the AA contacts for alkaline corrosion first — the usual failure point on cheap AA digicams. Confirm the lens telescopes smoothly, the 1.6-inch screen is unmarked, and a test frame writes correctly to a small SD card, as SDHC cards will not be recognised by cameras of this generation. Bundled chargers are irrelevant here, which keeps used buying simple: fresh AAs and a small card get it working.