I have few old lenses and make some shots from of same staff with different lens from one position (tripod).
Camera - Pentax K200D / ISO200
Lens:
CZJ Sonnar f2,8/200mm -
link
Tair-11A f2,8/135mm -
link
Helios-44-2 f2/58mm -
link
CZJ Tessar f2,8/50mm -
link
Yashinon DX f1.7/50mm -
link
Mir-10A f3.5/28mm -
link
Start with wide open:
Sonnar f2.8
100% crop
Tair f2.8
100%crop
Helios f2.0
100%crop
Tessar f2.8
100%crop
Mir f3.5
100%crop
Yashinon f1.7
100%crop
Yashinon f2.8
100%crop
Nrxt at f5.6
Sonnar f5.6
100%crop
Tair f5.6
100%crop
Helios f5.6
100%crop
Tessar f5.6
100%crop
Mir 5.6
100%crop
Yashinon f5.6
100%crop
Then f f8
Sonnar f8
100%crop
Tair f8
100%crop
Helios f8
100%crop
Tessar f8
100%crop
Mir f8
100%crop
Yashinon f8
100%crop
And f16
Sonnar f16
100%crop
Tair f16
100%crop
Helios f16
100%crop
Tessar f16
100%crop
Mir f16
100%crop
Yashinon f16
100%crop
For me the best lens is Tair - very sharp from start (at 2.8), and outstanding bokeh
Next are Sonnar and Yashinon.
Mir and Helios - solid lenses, but soft when are vide open
Tessar - very complicated semiautomatic aperture ring for full manual use and soft when is wide open.
Sorry for my bad english, but i think you understand.
Riba