Very good is the brand new Sigma 10-20mm f3.5 zoom that came out lately, drawback: only for APS-C sized sensors.
As a full frame wideangle zoom I can recommend the Sigma 12-24mm it offers definitely fixed lens quality in a zoom !
(google : sigma 12-24mm pontification...for a great review)
The Sigma 18-50mm f2.8 is a great lens as we ll as the latest edition of the 24-70mm f2.4 HSM version !!!
Landscape is not only wideangle in my opinion so the Sigma 120-300mm f2.8 could also serve well as the right tool especially for dim light early morning or dawn.
greetz,
ombud
As a full frame wideangle zoom I can recommend the Sigma 12-24mm it offers definitely fixed lens quality in a zoom !
(google : sigma 12-24mm pontification...for a great review)
The Sigma 18-50mm f2.8 is a great lens as we ll as the latest edition of the 24-70mm f2.4 HSM version !!!
Landscape is not only wideangle in my opinion so the Sigma 120-300mm f2.8 could also serve well as the right tool especially for dim light early morning or dawn.
greetz,
ombud