Products

The IUFOO, later catalogued as 12575, is Leitz's clip-on shade for the 90mm Elmar f/4 and the 135mm Hektor f/4.5, and it also fits the 90mm Elmarit f/2.8. It clamps over the A36 front ring instead of screwing into the filter thread, so a filter can stay in place beneath it, and one shade covers both focal lengths. It is the correct period accessory for screw mount and early M telephoto outfits, and the piece most often missing from them.