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DPChallenge Forums >> Tips, Tricks, and Q&A >> APO or not?
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07/26/2005 04:25:15 AM · #1
I'm kind of new into SLR's and getting a little confused with lens names. //www.sigmaphoto.com/lenses/lenses_all_details.asp?id=3241&navigator=3 and //www.sigmaphoto.com/lenses/lenses_all_details.asp?id=3240&navigator=3 look pretty similar to me, but since the APO lens costs more there must be something into it?
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