Nisha 44 to 49mm Step-Up Ring

The very thing

I needed this for a crazy task: converting my ancient (1952?) Leitz Elmar 9cm (90mm) lens to accept a 49mm lens hood or lens cap to be used on a Canon EOS M6 Mark II. It's a great old lens, great new camera (and because the sensor is APS-C, it's only using the center of this excellent lens). I already had an old Tiffen adapter ring to mount a Series VI UV filter, and it screwed into the 39mm front threads of the lens. I did not have a 44mm lens cap or hood to screw into that Series VI adapter, but did have some spares of each in 49mm. Bizarre and probably a little confusing, I know. This step-up ring bridged the gap, and everything fits great with no vignetting caused by the Tiffen metal lens hood, which screws into the step-up ring just like the metal lens cap pictured. (Nice to have a good lens hood when shooting in full sun with an old single-coated lens).