The next lens that is fortunate enough to be added to my collection is a Helioplan 40mm f/4.5, produced by Meyer-Optik for Exacta bayonet. Images of this lens mounted on a NEX-5 can be seen in its dedicated gallery, or alternatively, in the Gallerie de Gear.
Aperture range: f/4.5-f/22
Minimum focussing distance: 0.5m
Aperture blades: 10
It's a small lens with a distinct character - a keeper! :)
The ARG-file I use with exiftool for this lens: meyerhelio40f45.txt
-XMP:Lens=Meyer-Optik Helioplan 40mm f/4.5 V (EXA)