Tamron SP (55BB) F8 / 500mm Schmidt-Cassegrain design Mirror lens
Focal length : 500 mm Macro 1:3Maximum aperture : F 8 (fixed)
Overall dimension : 87 x 91.5 mm
FILTER : 82 mm
Weight : 0.595 kg
Min focusing range : 1.70 m
Tamron Sp was one fine mirror lens. it's pretty quite famous and well known. This version was the redesign of the 55b ( The famous sp series design by leica , have the vertical stripe on focus ring as if leica lens have) to fix some lil optic problem(close focus spherical aberration).They were first produce in 1983 and discontinue in 2005. Woking with tamron adapt to all (mine 's om mount).
picture from http://www.darasart.com/telescope/catadioptric.htm
some picture taken by tamron ( woking with olympus E3 iso 800 , A mode)
reference credit
http://www.bobatkins.com/photography/tutorials/mirror.html
http://www.darasart.com/telescope/catadioptric.htm
http://mirrorlens.blogspot.com/2007/09/tamron-sp-5008-tele-macro-model-55bb.html
http://www.bobatkins.com/photography/tutorials/mirror.html
http://www.adaptall-2.com/lenses/55BB.html
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