|Diameter x Length||-|
At 6 lbs this is definitely no lens for handholding, unlike Tamron's later autofocus 200-500. Sharpness is good for a long zoom though not quite up there with the long primes, and options for closing down the diaphragm to f11 or f16 are usually limited when shooting film with this lens, so it is often difficult to really use it to the absolute best of its abilities. High-contrast subjects will bring up some chromatic aberration of the purple/olive kind, as seems typical for Tamron's coatings. Build quality is very good, in both specimens I've owned and used the only slight wobble I've noticed in any of the moving parts was in the fit of the built-in hood around the front of the lens barrel.