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■	尼康全画幅新单反D3正式发布！

■	苹果也忽悠人！

标题：	尼康全画幅新单反D3正式发布！	收起

2007-08-23 15:50:05
今天尼康官方发布了全画幅的新单反：D3！相对于之前的DX画幅，今次的全画幅被成为“FX画幅（full-frame）”。机身装备1200万像素的CMOS感光器件，具有超强的动态范围，iso范围从200－6400，另外可以提升至iso25600！崭新的Multi-CAM3500对焦组件提供了51点对焦。连拍速度为9张/秒（DX画幅裁切模式下达到11张/秒）；超精细的92万像素3英寸宽视角液晶屏；仍然支持尼康专为DX画幅设计的DX系列镜头，在D3机身上将自动适应转换为DX裁切模式；重新设计的快门机构提供了最快1/8000秒的最短曝光时间和1/250秒的快速闪光同步，快门机构寿命达到30万次；HDMI接口的引入使D3可以直接向高清显示设备输送影像。下面是官方的规格介绍： 12.2 megapixel FX (full-frame) CMOS sensor with high signal-to-noise ratio, wide dynamic range and 12-channel readout. ISO 200 – 6400 : extendable up to 25600 (equivalent) and down to ISO 100 (equivalent). 9fps consecutive shooting (11fps in DX Crop mode) EXPEED image processing engine with 14-bit A/D conversion and 16-bit image processing for superb tonal gradation. Advanced Scene Recognition System combines the camera’s metering and AF sensors for precise exposures and sharply defined images. Multi-CAM3500FX 51-point AF system . Individually selectable or configurable in 9-point, 21-point and 51-point coverage settings. Picture Controls streamline in-camera image processing by enabling customization of image parameters before capture and offer complete control over sharpening, contrast, brightness, hue and saturation in various color modes. 920,000 dot 3-inch VGA LCD monitor with wide, 170-degree viewing angle. Live View with Autofocus enables composition of images using the LCD monitor. Two modes are supported: Handheld or Tripod. Two Crop Modes : DX format and 5:4 ratio. The DX crop mode can be automatically enabled when a DX lens is attached. Quick response : approx. 37 ms shutter-lag and 55 ms viewfinder black-out. Highly accurate, durable Kevlar/carbon fiber-composite shutter unit : Standard rating of 300, 000 cycles, with a maximum shutter speed of 1/8,000 sec and flash synchronization at up to 1/250 sec. Active D-Lighting enables superior high-contrast images by automatically applying tone compensation at the moment of capture. Dual CF card slots : configurable for parallel (simultaneous) or serial (consecutive) recording. HDMI video output interface enables connection to high-definition video systems. Intuitive ergonomics with optimized button placement for fast and comfortable handling. Durable Magnesium alloy body built to withstand the rigors of the harshest of environments. Wireless LAN and Ethernet support via optional Wireless Transmitter WT-4. 点击此处查看原文、参与讨论固定链接┆ 评论(1)┆阅读(635)

标题：	苹果也忽悠人！	收起

2006-11-29 18:40:12
以前记得是G5发布的时候，苹果声称G5运行photoshop效率比intel p4为代表的pc平台高90% 而现在imac mini也用上了intel的cpu，却说intel的cpu比G4快3－5倍。这不是自己打自己嘴吗？实际上，根据macworld文章指出,intel版苹果运行ps比G5和ibook都要慢 http://www.macworld.com/2006/03/firstlooks/minitome/index2.php “Photoshop: This is clearly not a program to use on a mini—especially if you make your living with it. As Jon noted in his review, the full-blown Photoshop CS2 performs quite slowly in comparison to its PowerPC counterpart. If, on the other hand, you happen to own a version that you use for the occasional minor project, you’ll find its speed slow but bearable. I tested a mesh filter applied to a 1024x768 image in CS2 on all three Macs here, and the results were as expected. The G5 finished in roughly five seconds, the PowerBook took about nine, and on the mini, it took just over 14 seconds. So while it’s slower, if you’re not doing a lot of heavy lifting with the program, you’ll probably find it acceptable. You will, though, tire of the slow loading times quite quickly. ” 点击此处查看原文、参与讨论固定链接┆ 评论(4)┆阅读(2657)

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