Hey
Swede, looks like you have fun with the Revuenon, great! I had the best experiences at f/2 as a very nice compromise, but I'm no macro guy anyway.
Originally posted by knyghtfall Thanks George.
For your shot, I'm guessing its slightly stopped down, and the aperture of that lens is elliptical, which is why the backlight bokeh is such an interesting shape?
Have just gotten the voigtlander 20mm as well, ...
Hey
knyghtfall,
I envy your Voigtländers, but maybe some day ...
Comes to mind I actually have an M42 Voigtländer Color Ultron 1.8/50, but that's just a Planar copy (a brutal razor, horses for courses...)
About the Trioplan, it's not stopped down, and it won't do funny things with the aperture shape anyway cause it has the very old school preset aperture - multi-blades equally turned by hand, no springs involved. The elliptical shapes come from distortion getting larger towards the edge. In
Abbazz's post here he says optical vignetting is the name for it. He also quotes astigmatism as the source of swirly bokeh. AFAIK astigmatism is also responsible to those rings and crosses on the Trioplan highlights. All in all a very bad lens :-)
Revuenon (a.k.a. Cosina) 1.2/55 @f/1.2 - typical coma wings on the upper edge. Hey that's not bokeh .-)