In article , dbrouse@athenet.net says...
>I have a chance to purchase a Tamrom SP 180 mm F2.5 LF (IF) with a 1.4x
>teleconverter for $150, but I had promised myself that I was only gonna
>buy Nikkor lenses from now on??? [....]

If the lens (and the source!) is OK, grab it! It is not a good deal
new, since it is close to the price of the equivalent Nikkor, but
at $150 used....!
Hope This Helps