First impressions sent to me from the buyer, Kelvin Lee: "The 135/1.5 arrived today. It's a real monster! Takes size 95 filters. Fortunately, the hood from my Pentacon-6 Sonnar 180/2.8 fits. It weighs a good 5 pounds. The lens completely dwarfs the Pentax LX I tried it on. It is singularly bigger than any lens I have. It does, however, need a cleaning due to the decomposing helicoid grease fogging on the glass but is otherwise in very nice condition. Will probably get it cleaned professionally... don't feel like tackling it myself. I'll take some photos with it once it's cleaned. As it stands, it's about 50-80% heavier than the [Computar/Porst 82mm filter-size] 135/1.8 and about 30-40% bigger. ... looks uncoated, though it's probably such a light coating as to not look present. Very well built , robust ... probably built in a time that Vivitar was trying to compete with the pros. Mine comes with the tripod collar... also well made."
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