Sony’s Alpha DSLR-A900 feels like it’s been with us for a long time – after all, the prototype was first shown back in March 2007 and its sensor unveiled in January 2008. So unlike its rivals which are often sprung with little notice, we’ve long-known what Sony’s flagship DSLR would look like and speculated how its new 24 Megapixel full-frame sensor may perform in practice.

Despite this advance information though, using the A900 in person is still quite a surprise in a number of respects. First, it’s larger and heavier than it looks, and once equipped with a quality lens like the Carl Zeiss 24-70mm f2.8, you certainly know you’re carrying it around. This is not a combination for anyone who wants to travel light, but it does feel well-balanced in your hands and like most heavier cameras, this heft instils a degree of confidence. It should also be said, the A900’s very distinct styling comes across better in the flesh than in photographs – it’s a unique but smart-looking camera.

The Sony A900 has to rank among the most anticipated digital SLRs in recent memory. The company first showed an early version of its upcoming flagship design at the Photo Marketing Association tradeshow in the spring of 2007, and at the following year’s show Sony revealed a few more details about the image sensor and stabilization mechanism it would use. With the Alpha A900 featuring a full 35mm frame-sized image sensor, Sony has joined a rather exclusive club. To date only four companies have offered full-frame digital SLRs. Of these, two – Contax and Kodak – have since left the digital SLR market altogether.

It is designed to deliver ultra-fine picture quality with the world’s highest resolution, 24.6-megapixel, 35 mm full-frame CMOS sensor and fast image processing with a new dual BIONZ® processing engines. The camera is also the first to have a body-integrated image stabilization system for a full-frame sensor with Sony’s SteadyShot® Inside anti-shake system.

One look at the camera’s distinctive pentaprism and nostalgic body design will evoke its full-frame optical performance. It features a bright, clear optical viewfinder with 100% field of view coverage that would impress even film photography loyalists.