When reading a lot of these FX threads two two keep coming up:
1) D3 and D700 low light capabilities: This is obviouly a big truth and one of the greatest virtues of these new bodies that allow photographers to shoot thing previously impossible and thus add an entirely new dimension to their photography. Big thumbs up to FX here
Also, I have not read this but another virtue is portraits with the 85mm prime, considered by many as a ideal FL for portraits on film is now back with FX. This removes some of the flatness from being further since FX vs DX you need to get closer to your subject to achieve the same mag. Also, the DOF is smaller when closer and background blur is ever greater than on DX. Another thumbs up for FX.
2) True Wide Angle with FX: Here, I beg to differ. Dx obviously changes the FOV vs Fx for the same focal lenght but this does not in any way mean true wide angle is not posssible on Dx. Special super-wide zooms exist for this type of shooting. 12mm on DX has a diagonal FOV of 99 degrres and 10mmm has a FOV of 99 degrees. Not to mention a 10mm fisheye which is 180 degrees. These lenses are f/4 at these FL's but the new kid on the block, Tokina 11-16 is a f/2.8 and many reviews show great promise for the new kid on the block partilarly with regard to distortion.
The cost of a super-wide DX zoom is less than the difference of the best and most expensive DX body (D300) relative to the least expensive FX body (D700). Plus, the lens will likely out live, and certainly hold its value longer than the body. Compare the investment of a superwide zoom addition for DX to the cost and weight of a longer lens in Fx. Of course on Fx you can go a little wider at 14mm with the remarkable and very expensive new Nikon 14-24 f/2.8 (and if you are a landscape shooter struggle with filters or just use wonderful 17-35 lens). Plus, who knows, Nikon may design new and improved super-wide for Dx down the road -- I would love a 10-24mm f/4.
Still have your doubts about the W I D E end on Dx? Well stay tuned to the monthly WIDE angle challenge this month in the Landscape forum
Okay, I'm ready. Throw stones
Albert J Valentino Nikonian Moderator Emeritus Vantage Point Images Mastery of Composition is the Key to Great Photography