The Deal With DX

When Nikon launched the original D1 in 1999, the big attraction was that it would seamlessly use any existing F-mount lenses a photographer already had. For a pro photographer, the biggest investment is in the glass.

During the autofocus revolution of the Eighties and Nineties, when Minolta and Canon left existing users behind by adopting entirely new mounts, Nikon stubbornly engineered an autofocus system that would allow the new cameras to retain backwards compatibility with older manual-focus lenses. With the transition to digital, they retained that same lens mount.

The thing is, CCD sensor technology was obscenely expensive. Elsewhere I looked at Canon's 1D, with an APS-H sensor, and its 1Ds, with a full frame 35mm sensor, and the price difference between these two otherwise very similar cameras:

To give an idea of how much the price of the sensor affected the price of the camera, the APS-H 4MP EOS 1D dropped in 2001 for $6500, and a year later the full frame 11MP EOS 1Ds joined it in Canon's lineup for a whopping eight grand. That's better than $200/MP or, looked at another way, seven dollars per square millimeter of additional sensor size. At seven bucks a square millimeter, the head of a pin would be $28 and a penny would be almost two grand.

Nikon went with a sensor size called "APS-C", which has 1/3rd less field of view than a standard 35mm negative, but is close enough to it in size to still be able to functionally use Nikon's existing library of F-mount lenses, although the practical result would be to give them a 1.5x focal length modifier.

For instance, I spent a day wandering around with a 35-105mm f/3.5-4.5 lens on the D1X. On a regular Nikon film SLR, this was a common enough walkabout lens in the Nineties; it covered a useful range of focal lengths from a wide-ish angle for street photography to a short telephoto for portraiture.

On the smaller sensor of the D1X, it was effectively a 53-158mm lens, however.

What does this mean in real life? Well, I saw this yellow house with an orange tree in the front yard and thought it was so colorful in the afternoon light that it warranted a picture...but there was literally no way to get it all in frame like I could have if it had been on a full frame camera, even by taking a step into the neighbor's lawn across the street.

It wouldn't be until 2003 that Nikon introduced lenses specifically designed to work with APS-C sized sensors, which Nikon called "DX". Where a typical all-in-one Nikon zoom for the film era had been a 24-120mm, the DX equivalent was a 16-80mm.

So, while a pro photog in 2001 who'd been using the F5 35mm film camera on the left could theoretically transition straight over to the D1X with all his kit*, he'd suddenly find himself short of wide angle lenses (but blessed with an abundance of super telephotos.)

*And the D1X is a camera that marked a lot of pros seriously transitioning. The original 2.7MP D1 was fine for newspaper photography, but the 5.7MP D1X could pretty much print anywhere 35mm film was used.