I just bought an older calumet 400c monorail 4x5 camera and it came with a Astra gon-commercial f=150mm 1:6.3 lems in a Seikosha-slv shutter, ser#97548 . It's sp eeds are 1-500, and B. 6.3/45. The glass looks clean and it has a hint of multic oating. I just tried a few shots of b&w with my polaroid 545i and ther not bad . My questions are: Is this lens ok for landscaping field work in the 150mm range ,and does anyone know the history of the lens and background, is the coverage su fficient for 4x5 ? I would appreciate any info on the subject. Thanks, Dan Kowalsky
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