Tariq Gibran wrote: Sam N wrote:
Maybe the OP was just getting fed up with all this talk of \"3D\"... heh.
Tariq Gibran wrote:
Interestingly, regarding design, the most current Z series 50 1.4 shares the exact same optical design with the older CY 50 1.4 AND this CY 50 1.7! So, that basic design goes back to at least 1975. Even before that, you will find that many normal lenses shared this basic 7 element design, though there were exceptions:
While not exactly the same, the current EF 50/1.4 and the old SMC 50/1.4 Tak also use the same basic 7 element planar design. It\'s just a good and economical way of making a decent, fast, and small lens.
The diagram I posted was actually from the Pentax! Here is the one for the CY Zeiss 50 1.7. The various Zeiss 50 1.4\'s are similar as well.
Well here is the diagram for the FL 55mm f1.2:
The four crosshatched elements are made of some special \"high-index\" glass apparently...Canons blurb of the time states this, quote: \"Utilization of four high-index glasses of a new type, together with a new design and positioning of the optical system, has completely eliminated high curvature of field and spherical aberration, resulting in greater center clarity, unusual for a lens with a maximum aperture opening of f/1.2.\"
Oct 28, 2009 at 03:48 PM
Previous versions of Alf Beharie's message #7702910 « Dispelling the Zeiss superiority myth? »
Here is the one for the CY Zeiss 50 1.7. The various Zeiss 50 1.4\'s are similar as well.
