Canon PowerShot G
维基百科，自由的百科全书
Canon PowerShot G是佳能旗下PowerShot数码相机的一个系列。G系列作为佳能消费级数码相机的旗舰产品，最大特点就是成像品质和机器本身的专业化——不输于数码单反。
G系列提供热靴接口，配备锂离子电池，LCD屏幕，支持RAW格式输出（在G7上一度取消，在G9上又恢复支持），支持大光圈的镜头组，高速的响应。
The G series offers features such as a hot shoe for an external Canon EX flashgun, the use of a lithium ion battery, a flip-out-and-twist LCD, RAW image format capture, a lens with a wider maximum aperture, remote capture, and faster electronics. However, with the release of the G7, RAW image support, remote capture, and a flip-and-twist LCD have been removed; RAW support was restored in the G9.
G系列一共有7个型号，最新款是2007年推出的G9。
目录 |
[编辑] 主要参数
| 型号 | 像素(百万) | 最大分辨率 | 光学变焦(等效35mm情况) | 最大光圈范围 | 液晶屏大小 | 发布时间 | 注释 | 照片 |
|---|---|---|---|---|---|---|---|---|
| G1 | 3.3 | 2048 x 1536 | 3x (34-102mm) | F2.0-F2.5 | 1.8" vari-angle | 2000年9月 | Powershot G 系列第一款相机 | |
| G2 | 4 | 2272 x 1704 | 2001年8月 |  |
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| G3 | 4 | 2272 x 1704 | 4x (35-140mm) | F2.0-F3.0 | 2002年9月 | Introduction of DiG!C processor. Introduction of internal neutral density filter. |  |
|
| G5 | 5 | 2592 x 1944 | 2003年6月 | |||||
| G6 | 7.1 | 3072 x 2304 | 2.0" vari-angle | 2004年8月 | ||||
| G7 | 10 | 3648 x 2736 | 6x (35-210mm) | F2.8-F4.8 | 2.5" fixed | 2006年9月 | Introduction of DiG!C III processor. Introduction of a new lens brought a 1cm macro mode and lens shift optical image stabilisation. Maximum sensitivity of ISO 3200. Face detection auto focus. The only G series camera to lack RAW mode capture. |  |
| G9 | 12.1 | 4000 x 3000 | 3.0" fixed. | 2007年8月 | Similar to the G7. Most notable changes were reintroduction of RAW image format capture, a better LCD, and a new sensor. |  |
[编辑] G1至G6
这部分早期的相机有如下的共同特征:
- 大光圈（最小F数达到2）
- 可旋转液晶屏，相机顶部还具有一个简单的状态显示液晶屏
- 支持RAW格式输出
- 1/1.8 英寸CCD传感器
- 可手动选择光圈或者快门优先
- 手动白平衡
- 内建闪光灯
- 热靴接口，支持外接闪光灯
- 支持USB连接
- 使用CF卡存储
- Availability of optional wide and teleconverter lenses.
- Canon’s proprietary EOS shooting modes, allowing the photographer to select different exposure settings for different environments.
- Included infrared remote control.
- In-built neutral density filter from the G3 onwards.
- Lithium ion battery.
[编辑] G7至G9
The G7 marked a major change in the G series. Prior to the G7 a fast lens, RAW image format capture, and a tilt-and-swivel LCD were all considered hallmark features of a G series camera. Some of the major changes included:
- Introduction of a lens with a minimum F number of 2.8, up from 2.0 in other G series cameras. Aside from being slower this lens introduced many improvements such as optical image stabilisation, a higher zoom range (6x), and a macro mode that can focus as close as 1cm. The lens can also retract completely into the camera.
- Change to a fixed LCD rather than a tilt-and-swivel model. The fixed LCD was larger (2.5" versus 2.0" on the G6) and increased the number of pixels by 75%.
- No RAW image format capture (JPEG only). (G7 only)
- No infrared remote control.
- Change from Compact Flash to SDHC card storage.
- Change to a slimmer battery (sourced from the Canon EOS 350D/400D DSLRs and camcorders) capable of less shots per charge.
- Black, mostly metal, body.
Many of the changes made allowed the G7 to be significantly slimmer than previous G series cameras (e.g., the thickness of the G7 is 4.25cm while the G6 is 7.3cm), making it more portable.
The G9 reintroduced RAW image format capture support. Other changes included an improved LCD (larger, higher resolution), and a change in sensor size to 1/1.7".
[编辑] 为什么没有G4和G8呢？
Canon, based in Japan, omitted the number 4 from the range due to cultural superstition.
Amateur Photographer also supported this:
- "the truth behind the leap from 3 to 5 is one based on cultural superstition — in Japan, the number 4 is considered unlucky. This is because the pronunciation of 4 — “shi” — is the same pronunciation as death. This is the reason why the EOS range jumps from the EOS 3 to EOS 5, and why the latest IXUS digital compacts bucks the trend of the IXUS v2 and IXUS v3 models by becoming the IXUS 400. Indeed, to find a Canon camera with a model number 4 you have to look back as far as the 1950s to the Canon IV."
[编辑] 参见
[编辑] 外部链接
