Pentax's 1991 flagship zoom compact - 38-105mm f/4-7.8 power zoom, red-eye update of the Zoom 105 Super.
The Pentax Zoom 105-R was a fully automatic 35mm zoom compact released in 1991 at the top of Pentax's Zoom compact series. It was a minor update of the Zoom 105 Super, adding red-eye reduction to that camera's feature set, and is a distinct model from the earlier Pentax Zoom 105 - the R suffix matters when matching listings.
The lens is a 38-105mm f/4-7.8 power zoom of 11 elements in 9 groups, controllable continuously or in steps at 46, 55, 70 and 85mm. Autofocus covers 1.35m to infinity, with macro from 0.75m and a fixed super-macro setting at 0.45m. The automatic shutter runs from 1/250 down to 60-second long exposures, non-DX film defaults to ISO 25, and power comes from two CR123A cells. It weighs 470g without batteries.
A feature-dense compact for its day - multi-shot self-timer, macro modes, long zoom - it suits shooters wanting one carry-everywhere film camera with reach for portraits and travel. It is heavy by point-and-shoot standards, and the slow tele end depends on flash or fast film indoors.
It will not operate without its two CR123A cells, which remain easy to buy. Check the power zoom extends and retracts without grinding, the flash charges, the LCD panel displays fully without bleed, and the film door closes tight. Confirm the DX contacts are clean, since dirty contacts drop the camera to ISO 25.