photo:contax500mmf8
Table of Contents
Carl Zeiss Contax 500mm f/8.0 Mirotar T* mirror lens
see also:
introduction
- this super telephoto lens is a catadioptric mirror lens, and as with all such mirror lenses, share the following characteristics:
- manual focus
- fixed aperture (in this case f/8.0)
- virtual elimination of chromatic aberration as uses mirror rather than lenses
- also means focus position for infrared photography is the same as for light photography
- central mirror:
- allows much more compact lens length as the optic path is reflected internally twice
- by necessity, blocks some of the light and thus causes:
- decrease in image contrast
- characteristic “doughnut” shaped bokeh imagery in out of focus areas
specs
- 500mm focal length and field of view (4.9°)
- fixed f/8.0 aperture
- 4 groups, 6 elements (including mirror), T* multicoating
- closest focus 3.5m
- 82mm front filter thread
- mm diameter, mm long and 795g (compare this with 255mm and 1.3kg for a 400mm refractor style lens)
- ~50% heavier and bigger than the Olympus OM 500mm f/8.0 mirror lens
reviews
photo/contax500mmf8.txt · Last modified: 2014/05/18 02:21 by gary1