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Sigma -XQ Mirror Ulta-Telephoto 500mm f4 T-Mount for $595
Posted By: vicentesagredo, 07-07-2011, 10:19 AM

dont know if its a good price...but a lot cheaper than the other ads

Sigma -XQ Mirror Ulta-Telephoto 500mm f4 Nikon T-Mount | eBay
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07-07-2011, 11:56 AM   #2
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Anyone tried a mirror lens with the AF 1.7x TC? Will it autofocus?
07-07-2011, 03:17 PM   #3
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QuoteOriginally posted by manishved Quote
Anyone tried a mirror lens with the AF 1.7x TC? Will it autofocus?

I have a Sigma 600mm and used it with the AFA1.7x and Yes, once you are close, the adapter is able to finetune your focus, (obviously depends on light conditions and the contrast/point you are focusing on) But remember the " In focus" on a mirror still fairly short DoF so it really can be hit and miss.

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