The Nikon D90

آموزش کار با دوربین عکاسی و فیلمبرداری Nikon D90

Almost exactly two years after the D80 was announced comes its replacement, the rather predictably named D90. The D80 has been one of Nikon's quiet successes, and even today, despite being positively Methuselah-like in digital camera terms it continues to sell and often makes its way into our top 10 most clicked on cameras. Because it looks so similar to the D80 the D90 appears at first glance to be one of those rather subdued incremental upgrades, but dig a little deeper and you'll find there's plenty to keep Nikon fans happy.

First and foremost there's a new CMOS sensor, which Nikon claim produces D300 quality output at up to ISO 6400 and - one of several features to 'trickle down' from higher models - the same highly acclaimed 3.0-inch VGA screen as the D3/D300. Naturally it has Live View with contrast-detect AF and it would have been surprising had it not sported some form of dust removal system. More surprising is the inclusion of the world's first DSLR movie mode (720p HDTV quality, no less) and HDMI output, though as we'll see later it does come with some limitations. A lot of the core photographic spec is the same as or very similar to the D80, though there is a new shutter and an implementation of the 3D tracking AF seen on the D3/D300.

And it's not just the high end models that have lent features and technology to the D90; the user interface has been given the same user-friendly treatment as the D60, as have the retouching options. As it was explained to us the D90 is intended to appeal to the broadest audience of any Nikon SLR, from first-time 'step up' customers moving from a compact to serious amateurs wanting comprehensive photographic control without the cost and weight of a D300. Whether the D90 is as capable as its feature set suggests, we'll see as the review unfolds.

Nikon D90 Key Features

12.9 megapixel DX-format CMOS sensor (effective pixels: 12.3 million)
3.0-inch 920,000 pixel (VGA x 3 colors) TFT-LCD (same as D3 and D300)
Live View with contrast-detect AF, face detection
Image sensor cleaning (sensor shake)
Illuminated focus points
Movie capture at up to 1280 x 720 (720p) 24 fps with mono sound
IS0 200-3200 range (100-6400 expanded)
4.5 frames per second continuous shooting (buffer: 7 RAW, 25 JPEG fine, 100 JPEG Normal)
Expeed image processing engine
3D tracking AF (11 point)
Short startup time, viewfinder blackout and shutter lag
Slightly improved viewfinder (96% frame coverage)
Extensive in-camera retouching including raw development and straightening
Improved user interface
New optional compact GPS unit (fits on hot shoe)
Same battery and vertical grip as D80
Vignetting control in-camera
72 thumbnail and calendar view in playback