Tamron 28-200 Various Model Differences

Old 28-200 New 28-200 (at May 2000) Newer Again XR Model as at Oct 2001
Model number is 571D - black, 271D - silver New model is 371D - black Black or Silver available
Model name includes 'Super' Model name includes 'Super II' Model name includes 'XR'
No zoom lock Has zoom lock at 28mm Has zoom lock at 28mm
Closest focus marked as Tulip sign Closest focus marked as 0.49m  19" Yet to find out
Closest focus only happens at 200mm Closest focus distance applies to all focal lengths Closest focus distance applies to all focal lengths
Macro rated at 1:4.8 at 200mm Macro rated at 1:4 at 200mm Yet to find out
Straight barrel Sort of V-groove appearance at focus ring area, matches style of 28-300 lens. Straight barrel, it is a lot smaller and lighter than previous models.
Plain barrel Chrome ring at front of zoom ring. Plain barrel

Reputed to be better optically with mention of improvements at 28mm where I think the old one had light falloff problems at max aperture. No comparison tests done as yet Said to be better again than the 371D model with even better performance in regard to light fall-off to corners at 28mm and less distortion throughout the range.
Contains aspheric elements.
 - Costs maybe $50 more of course Costs more of course.
Filter size 72mm Filter size 72mm Filter size 62mm

Here is a photo from a brochure to give a better idea of the model 371D shape...

Currently there is no indication as to whether the new XR model will replace the model 371D pictured above or will just be a lightweight version sold alongside. Later there has also been Di version which is stated as being optimised for digital cameras. There must be maybe 4 versions of this lens of various vintages available in shops , so it's a matter of buyer beware.

The interesting test would be a comparison between the Tamron and Sigma 28-200 as a recent (Mar 2000) test in an English magazine found the bigger super zoom Sigma 28-300 was better than the Tamron 28-300 except for the increased distortion (always an unwelcome feature of the 28-200 and 28-300 class of lenses).
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