Zeiss ZM 50mm f/1.5 C-Sonnar T*
Related: distortion, focus shift, Leica, Leica M, optics, Zeiss ZM, Zeiss ZM 50mm f/1.5 C-Sonnar
The 50/1.5 C-Sonnar is a classic design favored by some for portraits and its dreamy look when shot in the f/1.5 - f/2 range, as well as its classic (historical) look long appreciated in photography.
The compact design is characterized by uncorrected spherical aberration resulting in some focus shift, as well as wave-type field curvature. This is not a lens to look technically excellent, but rather one that offers unsual artistic qualities.
Use if this lens must be learned: its focusing characteristics (eg focus shift) can result in soft images if not understood! Get it only if you understand these issues; it’s an artists lens that takes some skill and appreciation to use well.
Not yet tested.
The T* coatings and 6 elements promise outstanding flare control.
Per Zeiss. See the datasheet.
|Aperture scale:||f/1.5 - f/16, 1/3 stops|
|Focusing range:||0.9m - infinity|
|Angular field, diag./horiz.||45.7°/38.4°|
|Coverage at close range:||37 cm x 55 cm|
|Image ratio at close range:||1:15|
|Number of elements/groups:||6 elements in 4 groups|
|Filter thread:||M 46 x 0.75|
|Dimensions (with caps):||ø 56 mm, length 63 mm|
The wave distortion is mostly pincushion, reversing to barrel distortion near frame edges.
However, the total distortion is only about 0.5%, unsually low for a 50mm lens, and thus likely to go unnoticed with the majority of images.
Not yet tested.
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