200% without 2x TC better than with TC, is TC useless?

Started 2 months ago | Discussions thread
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al404
al404 Contributing Member • Posts: 669
200% without 2x TC better than with TC, is TC useless?
1

I just got a Sigma TC-2011 and I can return it

I did some test on the same printed Euro bill and the image @ f2.8 upscaled to 200% looks better that the one taken with TC

this happen also if I stop down, I don't get a better image

I was wondering it it make any sense to keep the TC or would be the same to heavy crop and upscale ( in case I need )  while exporting

the lens is a Sigma 105mm f2.8 macro DG DN

TOP image with TC @ 100%

BOTTOM image without @ 200%

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