Although I'm excited about the D800/E (IMHO, Nikon really nailed it), I'm definitely not selling mine just yet. I just took a panoramic photo of Pfeiffer Beach as well as one of my properties and I continue to be amazed at how good the color is on my D700. In addition, the 7 FPS with the grip has allowed me to capture the round coming out of a 5" gun on a warship--probably the only disappointment I was in the specs for the D800 was the 4 FPS ceiling. The D800 gives up some flexibility that I enjoy on my D700--there is no other camera that I can think of in as small a package that has as much flexibility as the D700 (high iso performance for low light, fast frame rate for action, amazing color for landscapes). At less than 2 years old, my D700 still gives me great photos.
Prior to my D700, I owned a D100 for over 7 years before I finally decided to upgrade. I saw several "upgrade" opportunities during those 7 years. From the D70 to the D70s to the D200 to the D300 to the D3... when I finally upgraded, I only did so because I determined early on that I would need the following:
1. Twice the megapixels or greater with equal or better high ISO image quality
2. Full frame
3. Everything else the same as the D100 (including size and price)
For me to replace my D700, I would wait for the following:
1. Twice the megapixels or greater with equal or better high ISO image quality
2. HD Video
3. Everything else the same as the D700 (including FPS)
4. Another bonus
While the D800 meets the top 2, it falls short on the last 2 (especially FPS). The price is a little higher than I can afford also.
But that is not to say the D800 is not a great camera. I keep on reading comments on the tradeoff between the megapixel count and high ISO noise characteristics. I can understand that for landscape photographers, high ISO noise is not as much an issue. If it weren't for the fact that I shoot so much low light photography, the D800 would be the perfect camera for me. I see the D800 as targeting a slightly different audience than the D700 did. Perhaps there is still a D700 replacement out there that will become realized in the D8000. Nikon has a way of evolving their product lines in a unique way.
I'm just so happy with my D700 (with the sole exception of my peeling grip). I have been able to make some fantastic 13x19 prints. I have been able to focus solely on composition and lighting instead of worrying about the limitations of my camera, even in the dimmest of lighting. With my D700, my camera has finally become transparent.
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