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Sigma 10-20

EX - Sigmas top lenses, best glass 'pro' lenses
DC- Only works on cameras with an APS-C sensor ie the ones with 1.5 or 1.6 crop factor
HSM - Hyper Sonic Motor. Fast silent focus. The equivalent of canons Ultrasonic motor. Dunno what the Nikon and Pentax equivalents are.
As to the other questions I'll let someone else answer them
Neil
DC- Only works on cameras with an APS-C sensor ie the ones with 1.5 or 1.6 crop factor
HSM - Hyper Sonic Motor. Fast silent focus. The equivalent of canons Ultrasonic motor. Dunno what the Nikon and Pentax equivalents are.
As to the other questions I'll let someone else answer them
Neil

Nikon equivalents are bloody expensive.
By the way just got the 10-20, in a word, fantastic, solid, clear, inexpensive, fast, super wide, ok maybe a few words.
I have the 18-50 ex as well and have found that ok for landscapes but almost always at 18mm hardly anywhere above that, so if it where a choice for landscapes defo the 10-20.
By the way just got the 10-20, in a word, fantastic, solid, clear, inexpensive, fast, super wide, ok maybe a few words.
I have the 18-50 ex as well and have found that ok for landscapes but almost always at 18mm hardly anywhere above that, so if it where a choice for landscapes defo the 10-20.

As above, I have the Sigma 10-20, not just a landscape lens, but alows you to get up close on subjects, and is my most used lens, I thought about the 20-40 Sigma, as a partner to it but on a 1.6 crop I opted for the 18-50 2.8 EX, to get that little extra at both ends,also a very sharp lens, the 2.8 is good on walkabouts.
k 10 + 10-20 Adrian
k 10 + 10-20 Adrian

I have the Sigma 10-20, its a lovely lens, i use it for landscapes mostly, perfect. i also have the Macro 105mm lens from Sigma, again a very nice lens. back in the 70's sigma was a brand most of us avoided, the quality was not there, but now they are up with the caamera makers lenes, and sometimes better than them,