Neither of the sigmas are great. You have to decide if you want that lens range within a zoom and f/2.8. (if you need pro build quality and fast AF then the Nikon is the only option).
I think if you buy the D700 and you really care about that focal rnage, then the 24-70 is a must. If you do't care about that focal rnage but want soemthing to cover it, then one of Sigmas or Tamrons are acceptable for ocasional use.
Nikon is almsot certainly soon to relause an upgrade to the 24-120, in some kind of equivalence to the Canon 24-105 f/4 . Perhaps Nikon will provide a 24-120 f/4.
Personally I shoot either wider or longer, and when in the middle ground there are plent of prime altenatives.
24-70 is kind of a wedding lens mostly.
My dream D700 setup is a 14-24 2.8, 70-200 2.8 VRII, 35 1.4 or 2.0, 50 1.4, 85 1.8 (don't need the 1.4 here). The middle ground I could do with a Canon 24-105 f/4 just to round things off, so hopefully the Nikon is a good lens.
I think if you buy the D700 and you really care about that focal rnage, then the 24-70 is a must. If you do't care about that focal rnage but want soemthing to cover it, then one of Sigmas or Tamrons are acceptable for ocasional use.
Nikon is almsot certainly soon to relause an upgrade to the 24-120, in some kind of equivalence to the Canon 24-105 f/4 . Perhaps Nikon will provide a 24-120 f/4.
Personally I shoot either wider or longer, and when in the middle ground there are plent of prime altenatives.
24-70 is kind of a wedding lens mostly.
My dream D700 setup is a 14-24 2.8, 70-200 2.8 VRII, 35 1.4 or 2.0, 50 1.4, 85 1.8 (don't need the 1.4 here). The middle ground I could do with a Canon 24-105 f/4 just to round things off, so hopefully the Nikon is a good lens.
