The Sinar C is a modular large-format view camera built around Sinar's interchangeable rail system, combining elements of the company's monorail studio platform with field-orientated front and rear standards. It was positioned as a mid-tier option for photographers who wanted Sinar compatibility without the full weight and cost of the studio-grade P-series.

At UK auction, hammer prices for the Sinar C have ranged from £110 to £330, with the two recorded sales sitting either side of a roughly £220 midpoint. Saleroom values are highly condition-sensitive in 2026: bellows light-tightness, rail completeness and the presence of a usable lens board materially affect what a Sinar C is worth, and incomplete examples tend to sell for noticeably less than fully functional ones.