Tests on my 50mm f1.4 Carl Zeiss PLANAR T* on my CONTAX RTS II Quartz --- it seems to suffer from 'back focus' here at f2.8 focus was on the wire baskets but the Old Gent is OUT as are the Baskets and things inside the shop are sharper .
Tests on my 50mm f1.4 Carl Zeiss T* PLANAR on my CONTAX RTS II Quartz showing 'back focus' -- here at f1.4 I focussed on the Wall of the ruin but bricks on building behind are sharper.
aquilan
pentaxpete
