VEGA-11U 2.8/50 (Russian ВЕГА-5У) is an enlarger lens for designed to film format 24x36mm. The lens has a Zeiss Biometar optical design - 5 elements in 4 group. It can be used in priority for macro-sketches, but also in artistic photography and portraits. Produced since 1968 in USSR. #Vendor: AOMZ (Azov Optical-Mechanical Plant) #Lens Mount: M39 #The lens is designed for the enlarger and does not have the focusing node #It's can be used on a narrow format only with the macro tubes or macro fold bellows. #Optical design is 5 lenses in 4 groups (Biometar) #Resolution, center/edge lines/mm: 70/40 #Field of view: 38° #Working distance: 28.8mm #Focal range: 50mm #Max.aperture: 2.8 #Min.aperture: 11 #Aperture blades: 12