Erik van Straten
Veteran

Is then the bokeh the main difference between Heliar 50/2 and 50/1.5, other than the max apertute?
The lenses are very different. The Heliar Classic 50mm f/2 is a fully corrected lens, even at full aperture everything within the dept of field is sharp. The Heliar Classic 50mm f/1.5 is not fully corrected, there are all kinds of lens faults left uncorrected. This is done because some people like these effects. It is as if you work with a very old lens. The lens shows at full aperture spherical and chromatic aberration, linear distortion and vignetting. The Heliar Classic 50mm f/2 is free from these.
Erik.
gelatin silver print (heliar classic 50mm f/2) leica mp
