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PostPosted: Mon Sep 28, 2009 6:07 pm 
Hi all, as above, im sure this is a very easy answer but can someone please tell me what the difference is between these two...



Sigma 70-300mm f/4-5.6 APO DG MACRO
Sigma 70-300mm f/4-5.6 DG MACRO

basically i need to know what the apo stands for!

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PostPosted: Mon Sep 28, 2009 6:14 pm 
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Joined: Sun May 25, 2008 12:48 pm
Posts: 8087
Location: UK
APO hints towards apochromatic, which is a type of colour correction that can be used in a lens. I just noticed that Sigma don't actually use the term apochromatic anywhere that I can see...

Anyway, as far as these two lenses are concerned, all you need to know is the APO version is "better" but costs more.

Edit: I'm wrong, Sigma do write more about it here. Particularly items #18 and #20.

Canon DSLRs: 7D2, 7D1, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
Lenses: EF 35/2, 85/1.8, 135/2+SF, 70-300L, 100-400L, 100L, MP-E 65, EF-S 10-18, 15-85
3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 50/1.4A, 150 macro, 120-300 f/2.8 OS
Compacts: Sony HX9V, Fuji X100.

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