![]() ![]() There is no glass in the 500mm tube, but the 350mm tube has several elements (I think the 350mm tube is behaving like a Speed-Booster). Between this unit and the camera are 1 of 3 possible tubes (“mount adapters” per Kowa), used one at a time, which create a 350/4, a 500/5.6 or a 850/9.6 telephoto lens. There is a main head unit, which contains 1 fluorite along with 2 extra-low dispersion elements, and a round 9-bladed diaphragm. The Kowa comes in several mounts, but I think the Nikon mount version makes the most sense as it can be used on many brands with a simple adapter added between the lens and the camera. I got the lens off eBay from a Japanese dealer. I wanted to mention a really nice, manual focus telephoto that I think is under the radar for many people. I think it’s sufficiently interesting to post here. ![]() I’ve received information about many lenses that I did not test from a reader named Robert Jones. When I was testing the GFX 50S, I did a lot of work with adapted lenses. This is the 74th in a series of posts on the Fujifilm GFX-50S. ![]()
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