最近買了新的數位相機，和之前買的主要幾款相機，簡單作個規格比較，觀察產品及技術的演進。
| Ricoh RDC-7 | Canon 400D | Canon 600D | |
| Type | Digital Camera | DSLR | DSLR |
| Sensor | CCD 7.18x5.32 mm2 | CMOS 22.2x14.8 mm2, APS-C | CMOS 22.3x14.9 mm2, APS-C |
| Resolution | 3.3MP | 10MP | 18.7MP |
| Lens | 7.3-21mm (equivalent to 35-105mm) | 18-55mm (kit) | 18-55mm (kit) |
| Shooting Distance | 24cm to infinity 1cm to 24cm in Macro mode | 25cm to infinity | 25cm to infinity |
| Aperture Range | F2.6-F3.4 | F3.5-F5.6 | F3.5-F5.6 |
| Shutter | 1/1000s - 8s | 1/4000s - 30s | 1/4000s - 30s |
| ISO | 100-400 | 100-1600 | 100-6400 |
| Video Recording | 320x240 @ 15fps, MJPG | N/A | 1080P @ 30fps, 720P @ 60fps, MP4/H.264 |
| Storage | SmartMedia | CompactFlash | SD/SDHC/SDXC, Eye-fi |
| Interface | USB 1.0, NTSC/PAL Output | USB 2.0, NTSC/PAL Output | USB 2.0, NTSC/PAL Output, HDMI |
| Battery | 3.7v 1100mAH | NB-2LH (~500 photos) | LP-E8 (~440 photos) |
| Date | 2000.Jul | 2007.Jun | 2012.Apr |
| Price | NT$29000 (8MB SmartMedia) | NT$29000 (with 18-55mm lens, 2GB CF Card) | NT$23900 (with 18-55mm IS II lens, 32GB SD card) |
