Nearly two years after the introduction of the D80, Nikon has announced its successor, the D90. This new DSLR camera inherits its older brother’s outer dimensions, power source, 11-point AF module and most of its external controls, but adds a newly developed 12 megapixel CMOS sensor, EXPEED image processor, and a bigger, much higher-resolution rear LCD screen. The D90 also features a slightly improved viewfinder coverage, 3D focus tracking, ultrasonic sensor cleaning, 50% faster burst shooting, a larger buffer, Active D-lighting, in-camera raw development, an expanded ISO sensitivity range, HDMI connectivity, geotagging and Live View with Face Priority AF. On top of all that, it’s the first DSLR ever produced to offer an HD movie mode.

The control layout of the D90 is also very similar to the D80, with only the dedicated Live View button and an info button to the bottom right of the screen being completely new. The OK button has moved to the centre of the four-way pad, and the focus selector lock has been changed from a slider to a switch, but that’s it really – the other changes are cosmetic only, affecting the shape of buttons well known from the D80, and the colour of their labels. The similarities extend to the power source and the recording medium as well. The D90 runs on the same proprietary EN-EL3e Lithium-ion battery as the D80, and records images on SD/SDHC cards.

So, what’s new then? Quite a lot, actually. For starters, the D80′s ten megapixel CCD has been superseded by a 12 megapixel CMOS chip capable of providing a Live View feed, recording video and capturing full-resolution stills at 4.5 frames per second, up from 3fps in the D80. Even more importantly, the sensor can now clean itself, by way of high-frequency vibrations that will, at least in theory, shake off any non-adhesive dust particles that may have settled on the low-pass filter during a lens change. You can specify, via an option in the Setup menu, whether you want sensor cleaning to take place at shutdown, startup, both or neither, with the default being ‘both’. The cleaning process had no practical impact on startup times, which were near instant. The new image sensor is complemented by a more powerful processing engine and a larger buffer as well.

While the above changes remain invisible until you put the camera to actual use, there is one development that will be very hard to overlook for anyone taking even a casual look at a D90: the rear screen. The D80 already had a nice, big 2.5” TFT LCD with a resolution of 230,000 dots, but it pales in comparison with the D90′s three-inch, 920,000-dot monitor. On the new camera, the screen is used not only to navigate menus and to review pictures, but can also act as a secondary status display, facilitating the transition for former D50/D40/D60 owners who are not yet used to having a top-mounted status LCD on their cameras. And of course it’s also the rear screen that provides live view for capturing both stills and movies.

One of the extras the D90 offers over the D80 is Live View off the main sensor. While other manufacturers have been implementing this feature across their entire DSLR line, Nikon has, until now, reserved it for their higher-priced models, including the D300, the D3 and the D700. With the D90, Live View has arrived to less well-heeled Nikon fans as well. And while on their other cameras, LV was one of the drive mode options, it now has its own dedicated button. Live View is either delivered on the high-resolution rear monitor or on any LCD panel or plasma screen connected to the camera via an HDMI cable. There is a red rectangle in the middle, which you can move practically anywhere in the frame. When in manual focus mode, you can magnify into this rectangle in five steps simply by repeatedly pressing the button marked with a loupe icon, but this magnification seems to be interpolated rather than real.

Live View is also what’s used for the feature that has arguably generated the most interest in the Nikon D90: its movie mode. The camera records high-definition, wide-screen video in 1280×720 pixel resolution, at a frame rate of 24fps, in AVI format using the motion JPEG codec. The maximum size of a single video clip is 2 gigabytes which, given that movies occupy about 100 megabytes of storage space per minute, would theoretically translate into about 20 minutes of continuous recording, but – apparently because of certain legal regulations in the EU –, Nikon decided to limit the clip length to 5 minutes for high-definition movies. By offering video capture in a DSLR, Nikon has made it possible for filmmakers to play with depth of field the way they never could, taking advantage of the relatively big sensor and the wide assortment of Nikkor lenses.

Nikon D90, with its self-cleaning sensor, excellent meter, sophisticated multi-point AF system, large viewfinder, 4.5fps continuous shooting speed, wireless flash options and great degree of cusomisability is hard to beat, especially at its price point of around £679 for body only.

Read the full review over at PhotographyBlog.com

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