The Pentax MX is a compact, fully mechanical 35mm SLR introduced by Asahi Optical in 1976, using the Pentax K bayonet mount. It was positioned as the manual-exposure, match-needle counterpart to the aperture-priority ME, aimed at photographers who wanted a small all-mechanical body.

Auction data for the Pentax MX is sparse: a single 2023 UK saleroom result hammered at £44, so any sense of current value in 2026 rests on that lone data point rather than a stable range. Because this is a hammer price from a UK auction, it reflects wholesale conditions rather than retail asking prices, and what a clean, working MX is worth today can vary considerably with cosmetic condition and whether the meter is functional.