The cauldron. Inspiration, Leica 135mm Tele-Elmar f/4 (1966), Print Double, double toil and trouble; Fire burn, and caldron bubble. —William Shakespeare, Macbeth. (please click on the image to view) ↑Leica M9 and Leica Tele-Elmar 135mm f/4 @ f/5.6. Related