Tamron 90mm Macro with any 2X TC?


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dRebelXT

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May 14, 2005
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Last time read about one uses 105mm macro with a 1.4X TC.
I am wondering whether my Tamron can use any 2X TC on my 350D.

TIA for your advice. :)
 

zaxh81

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Jan 29, 2003
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So 90mm with 2x TC becomes 180mm F4?:dunno:
 

dRebelXT

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May 14, 2005
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zaxh81 said:
So 90mm with 2x TC becomes 180mm F4?:dunno:
180mm F/5.6 right? ;p It's quite normal for me to use F/8 in order to gain the DOF.
Wanted to know is, the model of TC and the impact on sharpness.

It's difficult to chase dragonflies too close with 90mm lens.
 

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