Ross Wide Xpres 5 inch f4 aerial reconnaissance lens (British Air Ministry)
This lens by Ross of England has a wonderful etched, bubbly bokeh. During WWII, the British Air Ministry commissioned lenses by Ross, Dallmeyer and other British makers for air reconnaissance use. My copy of the lens is one made by Ross for the Air Ministry. This was the only lens I used on a couple of trips in China, so some of these shots are not strictly about bokeh.