This is a tamron prime lens. Reviews of lenses by sigma, tamron, tokina, zeiss, zenitar, and others designed for pentax cameras Tamrons' fast 300's were probably their best adaptall lenses, they were certainly the most expensive due to large low dispersion elements
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This is a tamron adaptall prime lens.
[i]this is an absolutely superb optical design which features a three element focus group incorporating one low dispersion (ld) element, plus a five
This is a tamron adaptall zoom lens. [i] a wide angle to moderate telephoto zoom lens which offers above average optical performance This lens features an extraordinarily complex mechan This is a tamron zoom lens.
[i]a moderate wide angle lens with slightly above average performance
