Xacti DMX-C4是三洋公司推出的一款视频拍摄能力强大的相机，C4采用了一块1/2.7英寸的CCD影像传感器，总像素提高到了423万。可以拍摄2288×1712、1600×1200以及640×480三种分辨率的照片；采用了一款5.8倍光学变焦的镜头，LCD液晶显示屏1.8英寸，支持旋转取景。拍摄MPEG4动画时拍摄模式有TV-SHQ、TV-HQ、TV-S、Web-HQ、Web-S等五种分辨率模式，同样采用SD存储卡作为存储载体。
C4的外形酷似一个剃须刀，分别有深蓝、银白、红色三种颜色可供大家选择。外形尺寸为69×34×108mm，重量为159克。
机身的外壳是工程塑料，采用烤漆工艺，总体制造工艺是不错的，无论在部件组合程度还是在油漆色泽上都属上乘。C4作为C1的升级版本，在外观上面和前作饼没有太多的差异，但是细节上面还是有不少改动的。具体的改动有三个方面，LCD屏幕由原先的1.5英寸提高到1.8英寸；像素从300万提升至400万；最重要的就是改进则是在视频拍摄中加入了电子防抖功能。
C4拥有比各档次DV更好的静态照片拍摄质量以及比常规DC更为强大的稳定视频拍摄/回放能力，而相对类似三星双镜头DC/DV一体机又具备更为小巧的体积与操作便利性，因此我们不得不说三洋C4是一款相当有个性的数码影象产品。直接产生在电脑上可播放的MP4文件，本机也省去了常规DV必定会遇到的视频采集时间，使你的数码影象能够更有效率的与亲友分享。这个设计理念倒于SONY开发的DVDCAM以及JVC刚刚发布的HDCAM不谋而合。
重要的是，由于目前SD卡价格的迅速降低，使得C4改变C1市场销售成绩不佳的局面成为可能。在C1时代，即使你能忍受画面的动荡或者暗部颗粒的增加，但你恐怕也很难承受当时SD卡高昂的售价。而在今天，为C4配备一张1GB容量的SD已经并不是什么奢望，而这张卡又却却实实的能为你带来1个小时的DV拍摄时间。
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| |  | | | Effective pixel count | Approx. 4.0 megapixels | | CCD | 1/2.7 inch, 4.23-megapixel CCD (total) | | Recording media | SD Memory Card | | Recording file formats | Still: JPEG, DCF *1 , DPOF *2 , Exif Ver 2.2 *3
Video clip: ISO standard MPEG-4 (simple profile) Audio: AAC (48 kHz, 16 bit, 2 ch.) | | Resolution (pixels) | Still: [8.0M] mode: 3264 x 2448, [4.0M] mode: 2288 x 1712, [2.0M] mode: 1600 x 1200, [0.3M] mode: 640 x 480
Video clip: TV-SHQ mode: 640 x 480/30fps/3Mbps, TV-HQ mode: 640 x 480/30fps/2Mbps,
TV-S mode: 320 x 240/30fps, Web-HQ mode: 320 x 240/15fps, Web-S mode: 176 x 144/15fps | | Lens | f = 5.8 - 33.8 mm (38 - 220 mm on a 35 mm camera), 5.8x optical zoom lens
F: 3.5 (W) - 3.7 (T), AF: 8 groups, 11 lenses, built-in ND filter | | Photo range | Standard: 10 cm (wide) / 80 cm (tele) to infinity, Super macro: 2 cm (wide) to 60 cm (wide) | | Shutter speed | Still: 1/2 ~ 1/2000 sec. (Flash: 1/30 ~ 1/2000 sec., Lamp mode: max. 4 sec.)
Video clip: 1/30 ~ 1/10000 sec. | | Digital zoom | Shooting: 10x max., Playback: 51x max. ([8.0M] mode, depending on the resolution) | | Focus | Auto (Still: 5-point AF, Video clip: Continuous area AF), Manual (15 steps) | | Program AE | Auto/Sports/Portrait/Landscape/Night View/Fireworks/Lamp*4 | | Filter function | Standard/Cosmetic/Monochrome/Sepia | | Photometry | Multi-spot | | Exposure correction | ±1.8 EV (in 0.3 EV steps) | | Flicker reduction | Yes | | Sensitivity | Still: Auto (ISO 50-200), Manual (ISO 50/100/200/400)
Video clip: Auto (ISO 200-800), Manual (ISO 200/400/800/1600) | | Self timer | 2 sec./10 sec. | | White balance | Auto: Full Auto TTL, Manual: Sunny/Cloudy/Fluorescent/Incandescent | | Flash | Auto/Forced/Off (Slow synchro mode possible in Night View Mode) | | Audio | Microphone: Built-in stereo, Speaker: Built-in monaural (L/R mixed output) | | LCD monitor | 1.8-inch Trans-Reflective Low-Temperature Polysilicon TFT LCD 130,000-pixel(Coverage 100% when not connected with S-AV interface cable, 7-level brightness, 293 rotation) | | Interface | AV output (Video: NTSC/PAL composite video, S-video; Audio: Stereo sound via Docking station or connecting adaptor), USB 2.0 (in full speed mode: equivalent to 1.1, via Docking station or connecting adaptor) (storage class/PictBridge selectable) | | Power source | Lithium-ion battery (DB-L20, included), Charging AC adapter (VAR-AL20, included) | | Approx. battery life*5 | Still ([4.0M] mode): CIPA standard*6, 130 stills; LCD ON*7, 180 stills; LCD OFF*7, 220 stills
Video clip (TV-HQ mode): 60 min., Playback: 170 min.*8 | | Dimensions | 69 (W) x 108 (H) x 34 (D) mm (approx. 152 cc) | | Weight | Approx. 159 g (main unit only), Approx. 178 g (including battery and SD card) | | Included accessories | Sanyo Software Pack 7.1 CD-ROM, Docking station, Cable adaptor, USB interface cable, S-AV interface cable, SD Memory Card*9, Lithium-ion battery, AC adaptor charger (100 - 240 V) and power cord, Soft case, Neckstrap, Lens cap, Remote controller |
| | Product appearance and specifications are subject to change without notice.All company and/or product names are trademarks and/or registered trademarks of their respective manufacturers. SANYO makes no warranties or representations of any kind with respect to these products.
| | *1 | DCF is the abbreviation for Design rule for Camera File system, established by the Japan Engineering Information Technology Association (JEITA).
| | *2 | The DPOF (Digital Print Order Format) is a format for recording on storage media information such as the number of frames and copies desired for printing of images taken on the digital camera.
| | *3 | Exif Ver 2.2 is an industry standard established for file formating of images from digital cameras.
| | *4 | For still images, only available in [0.3M] mode.
| | *5 | Results may vary according to operating conditions.
| | *6 | CIPA (Camera & Image Products Association) standard.
| | *7 | Based on the following conditions: unit operated at room temperature, 1 shot taken every 20 seconds using 33% flash.
| | *8 | Continuous playback in Slideshow mode. |
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| | | | | SD memory card capacity | MPEG-4 video recording time (total)*1 | | TV-SHQ | TV-HQ | TV-S*2 | Web-HQ*2 | Web-S*2 | Sound only*3 | | 1GB | 41 min. 23 sec. | 1 hr. | 2 hr. 38 min. | 3 hr.49 min. | 4 hr. 54 min. | 16 hr. 49 min. | | 512 MB | 20 min. 59 sec. | 30 min. 34 sec. | 1 hr. 20 min. | 1 hr. 56 min. | 2 hr. 29 min. | 8 hr. 32 min. | | 256 MB | 10 min. 25 sec. | 15 min. 10 sec. | 39 min. 58 sec. | 57 min. 44 sec. | 1 hr. 14 min. | 4 hr. 14 min. | | 128 MB | 5 min. 13 sec. | 7 min. 36 sec. | 20 min. 03 sec. | 28 min. 57 sec. | 37 min. 14 sec. | 2 hr. 07 min. | | 64 MB | 2 min. 34 sec. | 3 min. 45 sec. | 9 min. 54 sec. | 14 min. 18 sec. | 18 min. 24 sec. | 1 hr. 03 min. |
| | | SD memory card capacity | Still photo capacity*4 | | [8.0M] Mode | [4.0M] Mode | [2.0M] Mode | [0.3M] Mode | | 1GB | 377 | 765 | 1,510 | 7,740 | | 512 MB | 191 | 388 | 766 | 3,920 | | 256 MB | 95 | 192 | 380 | 1,950 | | 128 MB | 47 | 96 | 191 | 979 | | 64 MB | 23 | 47 | 94 | 484 |
| | | *1 | Available video recording time is shown when a re-formatted card is inserted. Recording times may vary according to the type and manufacturer of the memory card, the subject and the shooting situation.
| | *2 | The maximum sequential shooting time in TV-S mode is 2 hours 30 minutes. In WEB-HQ and WEB-S modes, the maximum sequential shooting time is 3 hours.
| | *3 | The maximum sequential recording time for sound only is 9 hours.
| | *4 | Listed still photo capacities are only a guide, and may vary according to the type and manufacturer of the memory card, the subject and the shooting situation.
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而值得广大潜水摄影爱好者关注的是水下摄影器材生产商Epoque随即推出for C4的潜水外壳"EHS-400X" 防水深度:45m (150 feet) 尺寸: 161 x 132x 115mm 重量: 450g (陆上)
详图
 可外接附件 
资料提供:香港大中华潜水家
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