The Mamiya RZ67 50mm f/4.5 is a wide-angle lens for the medium-format RZ67 SLR system, covering the 6x7cm frame with a field of view roughly equivalent to a 24–25mm lens on full-frame 35mm. The Sekor Z designation confirms it is intended for the RZ67 body, not the earlier RB67 mount, and it was aimed at landscape, architectural and studio photographers working with the RZ67 platform.

At recent UK auction, the two recorded hammer results for the RZ67 50mm f/4.5 are £150 (November 2025) and £270 (April 2024), giving a median of £210 and showing how much a clean copy can sell for at saleroom level today. These are wholesale figures achieved on the rostrum, so retail asking prices from dealers will typically sit higher than what the lens is worth on a hammer basis. With only two data points the sample is thin, so condition, completeness of caps and hood, and glass clarity drive most of the price variation.