#30. "RE: Three reasons why I will not be getting a D700." In response to In response to 28 Wed 13-Aug-08 11:42 AM by danamc
>If i am understanding things right using a DX lens on the >D700 gives you a 6mp sensor. > >Given that the sensor is best that Nikon have I would still >doubt that the a 6mp on the FX sensor at any iso be better >than a 12.1mp off the D300. I just can't see it. > >I will be really interested to hear about the 6mp image >quality on the D700 as i say it again how can it be better >than the 12.1 on the D300. > >Cheers > >Johnny
You're assuming incorrectly that a sensor with a larger number of pixels is necessarily "better" than that with a smaller number of pixels. This from a D700 review by Alan Weitz:
"A cool feature of the D700 is that it can be used with both FX and DX-format lenses. It should be noted when you shoot in DX-mode the resolution of your image goes from an effective 12.1Mp to about 5.1Mp because you're using a smaller portion of the imaging sensor. In the real world this means you will get a larger image from a D300 (12.1MB image file) and a DX-format lens when compared to a masked D700 (5.1MB image file) coupled to the same DX-format lens.
On the other hand, it's worth noting DX-format images captured with the D700, while lower in resolving power, deliver a broader dynamic range compared to the 'same' image captured by a D300 due to the D700's larger pixel size (5.49 X 5.49 microns versus 8.49 X 8.49 microns). This difference in tonal range is most apparent when shooting under low-light conditions."
And this from an article from Nikons Webpage:
"Nikon offers an increasingly versatile digital camera lineup to meet a diverse range of needs and applications, and the image sensor can be an important factor in camera selection. DX format, for example, is more suitable for photographers requiring a mix of mobility, operability and image quality. FX format, on the other hand, is ideal for those seeking the same picture angle and picture blur as 35mm (135) format cameras, with higher sensitivity and wider dynamic range"