Tamron 200-500mm F/6.9 Model 06A: This lens is an optical
redesign of the earlier Adaptall model Z-500 and CZ-500 lens models. Its
obvious, after comparing the optical designs of this lens to its predecessor,
that Tamron's goal was to reduce the rather strong chromatic aberration and
lateral color within the earlier optical design. Tamron's earlier Z-500 and
CZ-500 models were unusual in that they were corrected for green and blue
rather than red and yellow colors. This was preferable since most nature scenes
predominately feature yellow and green colors, and since long distance
telephoto photographs generally are affected by deep blue and UV haze.
Nevertheless, the green-blue color correction in the earlier models resulted in
significant amounts of red chromatic aberration and red lateral color. This
significantly reduced the MTF for the earlier versions of this lens. Note that
chromatic aberration and lateral color should be greatly reduced in this
revised optical design, possibly making this lens an average to slightly above
average optical performer within its class. Tamron's 200-500 F/6.9 model 06A
lens was discontinued in 1984 with the introduction of Tamron's highly praised
SP 200-500 F/5.6 model 31A lens.
||f/6.9 32, AE
|Angle of View
(Groups / Elements)
|8 / 14
|Min. Focus from Film
||97.7 oz. (2770)
||Built-in type, retractable.
||Accepts SP 2X tele-converter #01F. Supplied
with exclusive tripod mount ring.