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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 15 Oct 2008 (Wednesday) 19:23
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Sigma 70-300 APO Macro Super question

 
tin.risky
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Oct 15, 2008 19:23 |  #1

I just picked up a Sigma 70-300 II APO Macro Super and was wondering if there's any noticeable IQ difference between that and the APO DG version. I know the DG is supposed to have an extra coating to reduce ghosting and flare, but is there actually a noticeable difference between the two models? Thanks in advance.




  
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amadain
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Oct 15, 2008 19:54 |  #2

If your lens says APO (apochromatic) then it has the special coating. I think DG just means that it's for cropped sensors...




  
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Oct 15, 2008 19:56 |  #3

DC is for cropped sensors.

I don't think even Sigma know if there is a difference between the APO and DG versions.

I did once suggest that the DG versions used a different focus motor/gear system to the APO versions, as it is possible to damage the drive gear if you try and manual focus the DG version when it is trying to auto focus.
This does not seem to be a problem with the APO version.


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Mike ­ Deep
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Oct 15, 2008 20:19 |  #4

According to Sigma, DG simply refers to "digital optimized coatings," which is about as meaningless as it sounds. I suppose it is a good indicator whether a lens came before or after digital.


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tin.risky
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Oct 15, 2008 20:32 |  #5

Thanks for the help guys. So I guess this means there's no difference in image quality between the APO DG and APO non-DG?




  
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Sigma 70-300 APO Macro Super question
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
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