Zeiss ZM 50mm f/2 Planar T*
Not yet tested.
MTF charts suggest that this lens offers excellent performance even wide open, with minimal field curvature and outstanding contrast and sharpness by f/5.6.
Per Zeiss. See the datasheet.
|Aperture scale:||f/2 - f/22|
|Focusing range:||0.7m - infinity|
|Angular field, diag./horiz./vert||47/39/27 °|
|Coverage at close range:||29 X 43 cm|
|Image ratio at close range:||1:12|
|Number of elements/groups:||6 elements in 4 groups|
|Filter thread:||M 43 x 0.75|
|Dimensions (with caps):||ø 52 mm, length 68 mm|
Like most 50mm lenses, there is moderately strong barrel distortion.
See coverage and comparisons in Guide to Leica.