The Cosina CSM is a 35mm film SLR produced by the Japanese maker Cosina. It sits in the entry-level manual-focus SLR category that Cosina supplied during the later decades of the film era.

Sales data for the Cosina CSM is thin: the only recorded UK auction hammer result is £56 in March 2023, so today's market value sits around that level at saleroom level rather than at retail. With just one data point, what a CSM is worth or sells for can vary widely depending on condition, included lens and cosmetic state.