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Where can I learn of the history of Contax?
Go to www.contaxcameras.com, click on News and then on history of innovation. Hyperfocal Distances in meters*
* The number before the slash is calculated using a COC of
0.025 mm., the value reportedly used by Carl Zeiss for engraving DOF data on
lens collars. The number after the slash is calculated using a COC of 0.033 mm.,
a value that yields greater DOF but which relaxes sharpness. ** The focal lengths used in calculations were 16.5, 21.5, 28.4, 35.1, 46.9,
and 90.3-mm.. The Hyperfocal Distance is greater than can be set using the LCD screen
display. What do I do?
Set your lens to infinity using manual focus and stop down the aperture until
the nearest distance you wish to be in focus is within the DOF for that
aperture. What is the significance of a “paper thin” depth of field?
Focusing any lens at its maximum aperture and minimum focusing distance
requires that special attention by paid to positioning the focus bracket as
precisely as possible in order to have the photograph sharp. For example, a Leica M 50-mm. f/1.0 lens focused at 1 m. has a depth of field
of 19-mm. or 0.74 in. and is reported to be a handful to focus under these
conditions. The CZ G mount 90-mm. lens at f/2.8 and its minimum focus distance
of 1 m. has a depth of field of 15 mm., or 21 % less than the 50-mm. f/1.0 lens.
The placement of the focus brackets using the 90-mm. lens at its limits has to
be absolutely precise to achieve sharpness. Is Contax a registered trademark?
No, it is not a registered trademark in all countries. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Miscellaneous
