> Can anyone give me the technical data of this lens (weight, size, filter size,
> close focusing distance)?
A great lens!
I am enclosing the info that was posted on the list by Greg Logiodice
some time ago. Sorry, it's in inches and ounces, but at least the
aperture range and no. of elements are in standard units ;-). I have
added unit conversions in parentheses where apropriate.
br,
Marko Vrabec
Kamnik, Slovenia
> Technical data for the Tamron 180 SP 2.5
>
> Focal length:.......180mm
> Aperture Range....f2.5-32
> Minimum Focus...3.9 feet (*---- 1.19 m)
> Optical formula.....10 elements/7 groups, 2 LD elements, Internal focusing
> Filter size ............77mm
> Length.................4 3/4 inches (*----- 12 cm)
> Weight.................28.2 oz (*----- 870 g)
>
> Comes with a leather pouch and a bayonet lens hood. (note idiosyncrasy -
> lens hood has such tight tolerance around the end of the lens that 77mm
> polarizer filter, with a slightly larger OD than lens itself, prevents the use
> of supplied lens hood)
>
> I really can't compare the Tamron vs the Zuiko 180, since I don't own the
> Zuiko, but in general, the Tamron is very well built, all metal, and feels as
> solid as my other Zuikos. It is very sharp and contrasty, and I have used it
> very effectively as a long macro lens with combinations of either the 1.4
> converter or a 25mm extension tube. Either will put you in the 1/3 life size
> range, with very nice quality. Really one of my favorite lenses. Only
> drawback is that I wish it had a tripod mount.
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