Teleconverters on macros...

Discussion in 'Beyond the Basics' started by rob1116, Feb 21, 2005.

  1. rob1116

    rob1116 TPF Noob!

    Jan 29, 2005
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    Wondering if anyone has any thoughts or experience with using teleconverters on macro lenses.

    I have a Tamron 90mm f/2.8 Di for my D70, and would like a little more range. Should/would've gone with the 180mm if finances permitted.

    I was thinking about the Tamron2x... speaking of which, I see two listed on thier site; the AF version and the SP AF version... the latter being more expensive.
    ASAIK, the SP stands for SuperPerformance as per Tamron, so I'm assuming either would work but the SP is high quality... no?

    It would be nice to be able to use it on my Tamron AF70-300 LD aswell... although the effective aperature would be crappy... might be fun for distant tripod exposures.. moon and such maybe?

    Thanks for your thoughts, once again.

  2. spike000

    spike000 TPF Noob!

    Feb 13, 2005
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    London, UK

    Teles will work fine on macro's but you will lose a large amount of light - usually 1 stop at x1.6 or 2 stops at x2. So your f:2.8 could rapidly become a 5.6 without too much care.

    You will also see image degredation, colour abberation and vignetting.

    Try some extension tubes on the 70-300.


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