Sigma 50-500 or Tamron 200-500
I have just rekindled my love for birdwatching and photography and want to combine both. I have just bought a Nikon D80 (just love it - was using a Panasonic FZ30 and the difference is staggering). It came with a 18-135 lens that is great for general stuff but I need a long lens for the wildlife. Would love to be able to afford a Nikon prime but way too expensive. I had thought about the new Nikon 80-400 VR but 400 is not long enough and from what Nikon tell me it will not take a teleconvertor.
It seems from what I read that for value for money the two lenses are the Sigma 50-500 and the Tamron 200-500. Which would you recommend.
Also what is the best teleconvertor to go with them
Thanks in advance
Michael
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