Instant purchase without comments is welcome! Canon EXTENSION TUBE FD 50 Canon Extension Tube for Enlarged Photography, with Rear Cap Includes a Canon genuine lens rear cap. This is an extension tube "50mm" for macro photography, for manual Canon FD lenses. It's an intermediate tube that allows close-up photography from 0.5x to 1x magnification with TTL/AE functions. When attached to a 50mm lens, it achieves 1x magnification, and with a 100mm lens, it achieves 0.5x magnification, with a corresponding increase in exposure factor. I also have many other unique items for sale, so please take a look via the links below. #telesight's camera #telesight's products We offer anonymous shipping via Mercari, so thank you for your consideration. Canon Canon Close-up ring Extension tube