Canon EOS 350D with Carl Zeiss Sonnar T* 2.8/135mm

Veijo Vilva

(Page under Construction)

  • FOV corresponds to a 215mm lens on a 35mm camera
  • very sharp at f/5.6, somewhat softer at f/2.8

  • the lens is mounted with an Contax/Yashica Bayonet-to-EOS adapter
  • manual focus
  • AV (aperture priority) or M (manual)


  • my test procedure isn't very rigorous
  • bad results may be caused by bad focusing as manual focusing in dim lighting isn't any too easy when the DOF for this level of expected sharpness is just a few millimeters in either direction
  • the test only shows that the specific tested lens is at least as good as my results -- even that individual lens might be better, and others of the same make and model may be better or worse
  • anyhow, the equivalent magnification of the 100% crops is just plain sick, i.e. about 48x on a typical 17", 1024x768 CRT. Normally, 8x has been considered a reasonable maximum for critical sharpness from film. At 48x magnification, a 35mm film frame would be about 172cm (68") wide, and even a 1.6x crop factor dSLR frame would be 107cm (42") wide!

At f/5.6:

At f/5.6 everything is quite sharp, even at the edges. (Full-size, 2.6Mb)

A crop from the edge at f/5.6:

A crop from the edge at f/2.8:

(Full-size, 2.2Mb)

Test Photos at Full Aperture (f/2.8)

Note: All shots hand-held
Note: the crops have been converted from unsharpened raw files

A 100% Crop:

Levels adjusted, local contrast enhanced (Full-size original, 1.1Mb)

A 100% Crop:

A 100% Crop:

A 100% Crop:


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