Olympus's late 35mm ZLR bridge SLR — fixed 28-110mm zoom, hybrid of iS-200 and iS-300, limited-country release
The Olympus iS-21 was a late entry in the iS series of 35mm ZLR (Zoom Lens Reflex) bridge cameras, single-lens-reflex bodies with fixed zoom lenses that sat between point-and-shoots and interchangeable-lens SLRs. Released around 2000 in only a few countries, it was described by the Olympus enthusiast literature as a hybrid of the simpler iS-200 and the more capable iS-300.
It carried the simple-line 28-110mm built-in zoom, expandable to 160mm, 180mm or 210mm at the long end with Olympus iS/L screw-on teleconverters, and used a high-resolution aspherical lens element. Autofocus offered a Continuous AF option in the Stop Action program, with flash pre-flashes acting as an AF assist that lets focusing work even in darkness. Like the iS-300 it supported Super FP daylight fill-flash at fast shutter speeds, though it lacked exposure compensation.
Operation follows the intuitive Direct Mode Selection buttons of the simple iS models, making this an easy way into reflex 35mm photography without a lens system to buy. It suits film shooters who want SLR framing and a flexible zoom in one sealed unit; the trade-off is no lens changes, no exposure compensation and dim maximum apertures typical of the line.
These are fully electronic bodies that will not fire without healthy batteries, so test power-up, zoom, film advance and flash charge before buying. Check the viewfinder and top LCD for clarity, the film-door seals for wear, and the built-in flash raises and fires; boxed examples are uncommon since the model had a limited release.