Photography Tamron 17-50mm f2.8 - different grades, china vs japan
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 Jun 19 2007, 07:57 AM, updated 19y ago
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#1
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Elite
9,856 posts Joined: Jan 2003 From: Kuala Lumpur, WP  
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Apparently some of the lenses are made in China, and some made in Japan. I was told that those made in China has worse optics than those made in Japan. My tamron has a serial of under 400, and is fully made in Japan. My friend's made in China, serial well over 15000...
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Jun 19 2007, 10:14 AM
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#2
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Elite
9,856 posts Joined: Jan 2003 From: Kuala Lumpur, WP
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it's not a clone, they are just manufactured in China now. There's a thread in dpreview about this and also otehr threads in other forums. Apparently the china made ones have front/back focusing issues as well as overexposure issues.
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