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FORUMS ➔ Cameras, Lenses & Accessories ➔ Canon Lenses 
Thread started 08 Nov 2005 (Tuesday) 06:48
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New Tamron 28-75

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Simon ­ Spiers
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523 posts
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Joined Jan 2005
Location: Crawley Down West Sussex UK (SE of Gatwick Airport)
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Dec 24, 2005 14:58 as a reply to  @ post 1022974 |  #16

markyb wrote:
seen lots of posts about front / back focusing
could somebody explain (in plain english) what this is all about please

Basicly the lens focuses in front of the target(front focus) or behind (back focus). It is a calibration error in the lens and this lens is especially bad.
I might also add I have returned my 17-35 Di for lack of sharpness too.


Canon EOS 20D /70D/450D/ Tamron SP AF 17-35 mm f 2.8-4 DI/Tamron 28-75mm f2.8 XR DI / Canon EF 100-400 USM IS L / Speedlite 580EX and Better Beamer/ Pentax SMC Takumar 50mm f1.4

  
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New Tamron 28-75
FORUMS ➔ Cameras, Lenses & Accessories ➔ Canon Lenses 
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