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Zeiss ZM 85mm f/2 Sonnar T*
Related: distortion, Leica, Leica M, optics, Zeiss ZM, Zeiss ZM 85mm f/2 Sonnar
Its low distortion and ultra-high imaging quality make it eminently suitable for true-to-life imagery.
Like all lenses over 50mm, your primary challenge on a rangefinder like the Leica M9 will be accurate focus and framing, just as with the Leica 75mm f/2 APO-Summicron-M. In essence, perfect 20/20 vision is needed, along with perfect rangefinder focus adjustment.
Leica M9/M7/M8 users should consider the Viewfinder Magnifier 1.4X for use with 75/85/90mm lenses.
This lens offers very high performance, but please see the Guide to Leica for commentary.
Per Zeiss. See the datasheet.
|Aperture scale:||f/2 - f/16 in 1/3 steps|
|Focusing range:||1m - infinity|
|Angular field, diag./horiz./vert||29/24/16 °|
|Coverage at close range:||23 cm x 35 cm|
|Image ratio at close range:||1:10|
|Number of elements/groups:||6 elements in 6 groups|
|Filter thread:||M 58 x 0.75|
|Dimensions (with caps):||ø 70 mm, length 100 mm|
A faint trace of pincushion distortion is all there is.
This is effectively zero distortion for any practical purpose, and much less distortion than the Leica offerings in the 75mm - 90mm range.
Please see discussion in Guide to Leica.