Mamiya 645 Pro with Mamiya-Sekor Zoom C 55-110mm f4.5 brand_Sigma this lens has visibly “yellowed”

this lens has visibly “yellowed” optical elements

Fomapan Profi Line Creative 200 is a black and white film made in the Czech Republic

and you're not going to convince anyone otherwise

Includes a #0 retaining flange

Mamiya 645 Pro with Mamiya-Sekor Zoom C 55-110mm f4.5 brand_Sigma this lens has visibly “yellowed”The Mamiya 645 Pro is a relatively modern medium format SLR with a streamlined design, a well integrated TTL metering prism, and a large library of Mamiya 645 lenses to choose from. This 645 Pro includes the slightly bulky but pretty darn useful 55 110mm f4. 5 zoom lens, roughly equivalent to a 35 70mm lens on 35mm. In excellent condition, with good shutter speeds and accurate metering.