重量和尺寸
| 镜头重量 |
416 g |
| 镜头长度 |
81.3 mm |
| 镜头直径 |
68.2 mm |
| 重量（包括电池） |
1480 g |
图片质量
| 图像传感器尺寸 |
1/2.3 " |
| 相机类型 |
SLR Camera Kit |
| 总计百万像素 |
40.01 MP |
| 图像传感器尺寸（宽×高） |
44 x 33 mm |
| 支持的视频格式 |
DNG, EXIF, JPG, PEF, RAW |
| 传感器类型 |
CCD |
| 像素 |
40 MP |
快门
| 相机快门速度（最小） |
1/4000 s |
| 相机快门速度（最大） |
30 s |
曝光
| 测光 |
Centre-weighted |
| ISO感光度（最高） |
1600 |
| ISO感光度（最低） |
100 |
| 曝光类型 |
Aperture priority AE, Auto, Manual, Shutter priority AE |
| ISO感光度 |
100, 1600 |
端口 & 界面
| HDMI |
Y |
| USB 接头 |
Mini-USB B |
| USB版本 |
2.0 |
聚焦系统
| 光阑叶片数量 |
9 |
| 滤波器大小 |
67 mm |
| 最小光圈 |
2.8 |
| 最大光圈 |
22 |
| 固定焦距 |
55 mm |
显示器
| 可变角度液晶显示器 |
N |
| Flip-out screen |
N |
联网
| 近场通信（NFC） |
N |
| 无线局域网连接 |
N |
| 蓝牙 |
N |
40MP, CCD, TTL, 7.62 cm (3.0 ") TFT + smc D-FA 645 55mm F2.8
Image size is a very important factor in advanced photography: the larger the image size, the more faithfully the ambience and sense of depth can be described, resulting in colour-rich, fine-detailed images. The 645D incorporates a large, high-performance CCD image sensor (approximately 1.7 times larger that that of 35mm-format models). Because of this, it provides superb image detail, unmatched by 35mm-format photography, and gives a boost to the creative aspirations of all photographers.
Distinctive imaging characteristics different from those of 35mm format
Rich gradation, natural depth-of-fiend description at open aperture, and crisp image definition at smaller apertures. The large image circle and broad sensor plane of the medium-format image sensor assures these benefits — factors essential for producing super-high-quality, true-to-life images unrivaled by 35mm-format counterparts. In addition, since a medium-format lens has a longer focal length than a 35mm lens with the same angle of view, it offers a better details of textures and makes the subject stand out more sharply against beautifully obscured background.
