Неужели у dcs-2000 только 320*240 хуже чем dcs-1000 (640*480)?

Да, 320х240.
У 1000 разрешение матрицы такое-же, 640х480 получается программно.

Camera Specifications
- 1/3 inch color CMOS sensor, interlace scan mode
- 24-bit RGB, 640 x 480 resolution
- Operating System: pSOS+ (real-time O.S.)
- Automatic Gain Control (AGC): 24dB
- Automatic Exposure (AE)
- Automatic White Balance (AWB)
- Electronics shutter: 1/60 ~ 1/15000 second
- Minimum illumination: 2.5lux @ f1.4
- Lens mounting: standard CS mount type lens, 6.0mm, f1.8
Image (Video Setting)
- H.263+ (MPEG4 short header mode) data compression
- Compression ratio: 5 levels
- 3 adjustable image sizes and quality intelligent motion detection windows
with flexible bit rate
- Time stamp and text overlay
Audio
24Kbps
Video Resolution
- Up to 30 fps at 160 x 120
- Up to 30 fps at 320 x 240

На столе такая стоит. Переключателя размера на 640х480 нет.
Софт 1.04f