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03-23-2008, 05:26 PM   #1
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OniFactor's Avatar

Join Date: Nov 2007
Location: Binghamton, NY, USA
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sigma 100-300 f/5.6-6.7?

anyone ever use this lens? is it halfway decent? can it be used for birding halfway well? i'd like to find a 500mm mirror lens, but i haven't seen any decent ones on KEH or ebay recently.. halfway tempted to just get a phoenix for now.. :-X

03-23-2008, 05:55 PM   #2
ivoire's Avatar

Join Date: Mar 2007
Location: chicago burbs
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Posts: 3,368
I'm not familiar with the sigma, but am with the phoenix 100-400mm. If you are looking for very good resolution and above, the phoenix doesn't deliver. That said, i bought one to determine if i'd like birding. it was $75 on ebay and i later sold it for what i paid. It opened up birding for me and gave me hours of experience. I then bought a 400mm sigma apo macro that was quite good, sold it at a loss and bought a pentax 300mm F* f4.5 which is absolutely fantastic. if you want to try out birding and are unsure if its for you, i would recommend the phoenix. if you really enjoy it, sell the phoenix and then go for the best possible glass.

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