According to an eMail received by Nikon rumors, the D400 will be a significant upgrade to the D300s. Here are some of the key points:
-Sensor: 24 Megapixel APS-C CMOS sensor (Bayer type or new type 1-layer sensor which do not have Bayer filter but anyway needs three pixels to create any color. This new type will be better at high sensitivies)
-Sensor filtering: Nothing (IR and AA filters are detachable and they are in a detachable lens mount module)
-And that lens mount module: Detachable and including two filter slots for carrying example of Anti-Aliasation and Infrared filters or what you want to mount over your sensor? Detachable lens mount module is also useful for easy cleaning of sensor and prism too…
-Sensitivity: 100-51200 ISO (Boost 50, 102400, 204800, 409600) (IQ* over 2 stops better than D3s)
-Autofocus sensor: 201 points MultiCAM-5000DX (all points cross type, huh) or it’s possible AF can be a completely new type?
-Memory: Two CompactFlash card slots and one standard USB3.0 port on the camera right side for moving the photos and videos to memory stick or hard disk or shooting to them directly
-Weight: Around 1000g without battery, memory card or body cap
-Release date: 4th quarter of 2011 or 1st quarter of 2012
Well, judging by those specs it looks like the price will just about double, am I the only one who thinks that this article is totally unrealistic?
And later it states that a D400x will be coming later that year...
Sensor: 36 Megapixel full size 3MOS (samelike as Sigma Foveon) or 3-layer JFET-LBCAST
Full frame sensor next year? I don't think so. Of course, it's no less unrealistic than the D9000 that's apparently going to replace the D7000 in 2012 for $1200 and an FX sensor.
I don't know who sent this in, but it seems pretty far fetched.
You can read the article here