Sigma 10-20mm D DC

Helium_Junkie · 1 Apr 2007 at 12:29

Can someone explain further the meaning of D and DC on this lens? The sigma site says this for DC:

"These are special lenses designed so that the image circle matches the smaller size of the image sensor of most digital SLR cameras. Their specialized design gives these lenses the ideal properties for digital cameras, the compact and lightweight construction is an added bonus!"

Does this mean that it's a true 10mm? the that 1.6 crop factor thing doesn't actually apply?

And the single D on its own, is that the glass grade? And if so, is D good? Both of my Nikon lens' are G, is G worse?

Helium_Junkie · 1 Apr 2007 at 13:48

So the DC thing - what does it actually mean?

Helium_Junkie · 1 Apr 2007 at 13:58

divine_madness said:
you can't really compare labels across brands.

Ah, thought it might be a standard grade or some such

Helium_Junkie · 2 Apr 2007 at 09:46

"but with lenses designed specifically for these smaller sensors, DSLR owners can look forward to taking up wide-angle photography once more."

That again sounds like it's implying that the lens is made to adjust for that 1.5x crop factor and still provide true 10mm goodness.
Oh I dunno. Would love to see comparitive shots of this lens and a 35m equivalent.

Also, what's the aperture ring all about?

Helium_Junkie · 2 Apr 2007 at 11:06

My sigma has one, I've never changed the setting though.
Thanks for all the advice