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FORUMS ➔ General Gear Talk ➔ Flash and Studio Lighting 
Thread started 01 Feb 2005 (Tuesday) 10:50
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Sigma 135-400mm f/4.5-5.6 Aspherical RF APO Zoom Lens and 20D

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cowboyupphotos
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Feb 01, 2005 10:50 |  #1

Anyone using the Sigma 135-400mm f/4.5-5.6 Aspherical RF APO Zoom Lens and a 20D or Digital Rebel? Good, bad, ugly?

Rick Najdzion

www.cowboyupphotos.com (external link)

  
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mmartinfan
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Feb 02, 2005 17:19 |  #2

http://www.jetphotos.n​et/viewphoto.php?id=41​6534 (external link)

seems fine




  
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cowboyupphotos
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Feb 04, 2005 08:43 |  #3

This is a reply I received from Sigma Photo in Ronkokoma, NY -

If serial numbers of 135-400mm & 170-500mm start with 1 or 2, they both need to be upgraded. If it starts with 3 or higher, it is compatible. For lenses that need to be upgraded, we do it free of charge here at Sigma in Ronkonkoma, NY.

80-400mm and 50-500mm do not need an upgrade, they are compatible with 20D.

Rick Najdzion

www.cowboyupphotos.com (external link)

  
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Sigma 135-400mm f/4.5-5.6 Aspherical RF APO Zoom Lens and 20D
FORUMS ➔ General Gear Talk ➔ Flash and Studio Lighting 
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