D3100
Rumors about a new entry level DSLR between the Nikon D3000 and the D5000 started few months ago. This new camera will not be called D4000 as previously expected, but Nikon D3100.
This is a break down of the main specs/features:
- continuous AF in video mode/live view (yes, that’s right – it seems that the continuous AF I mention earlier today will first be introduced in the upcoming Nikon D3100)
- new AF points configuration which should cover a very large portion of the viewfinder. Total of 11 or 12 AF points.
- 10 MP CMOS sensor
- HD video: 1080p/24 and 720p 30/24!
- AVCHD video codec
- In camera video editing capabilities
- 3fps (same as D3000)
- will be sold in a kit with the 18-55mm lens
- expected announcement in “few weeks”
- no swivel display
[NR] rating: 99%
This could well be the first pictures taken with the Nikon D3100 (I know, the date is 2009, EXIF can be manipulated, etc.)









Continuous AF in video mode/live view patent (used in the upcoming Nikon D3100)
As some readers already noted, this previously covered patent application could be the base of the new continuous AF in video mode/live view feature which will first be implemented in the new Nikon D3100 DSLR camera. As you can see from the drawings, Nikon produced various camera configuration as a possible implementations of this patent, which could indicate that this solution will spread across all future Nikon cameras, including the EVIL system.
Nikon patent application 20100150539 is for a focus adjustment solution (see wikipedia’s explanation of the two different passive focus solutions: phase detection and contrast measurement). Different implementations are shown in this patent application: the first drawing is a camera with a half mirror, the second is mirrorless (EVIL) camera, the third implementations is without a prism (Pellix camera?) and in the last drawing the sensor is located under the mirror (instead of behind the mirror):
Quotes from the patent application after the break:
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