Well I've done it - dropped the 75mm lens for my Mamiya 6 on the cement. Aperture ring doesn't turn, shutter doesn't fire, and the filter ring is toast. So here's the good news - fully insured. I have sent the lens to Mamiya for a repair estimate, but they only offer a 90 warranty on their repairs. Also, I have the lens insured for much more than a used on would go for nowadays. Is is smarter to go with a factory repair job on the current lens, or to take the insurance money and buy another used one? Which one seems less risky?