The Mamiya 7 43mm f/4.5 is an ultra-wide-angle lens for the Mamiya 7 and 7 II rangefinder medium format system, designated by the 'N' prefix convention used across this line. With a 6x7 image circle, it is one of the widest rangefinder lenses ever produced for roll film and was designed for landscape, architectural and interior work where an external viewfinder is used for framing. Its worth and value reflect both its specialist optical role and the limited production of the Mamiya 7 system overall.

At recent UK auction, hammer prices for the 43mm f/4.5 have ranged from £252 to £529, with a two-sale median of around £390 based on the limited data set. These are saleroom results — wholesale levels excluding commission — and as of 2026 the lens still sells for considerably less than retail dealer asking prices, though the small sample means any single result can skew the picture. Copies offered complete with the matching external viewfinder typically command a premium over lens-only listings.