At the PhotoPlus Expo this past September I stopped by the Sony booth. Having received pre-show information, I wanted to try their pair of new cameras – the Alpha A33 and A55. While both look and function like DSLRs, a more appropriate term might be DVF – Digital ViewFinder – since neither uses a reflex mirror. Instead, they sport a fixed translucent “mirror” that sends a small portion of the incoming image to the viewfinder and the remainder to the “film” light sensor.

This technology isn’t new. In the early 1960’s Canon made a model called the Pellix using a similar scheme with a pellicle mirror. My uncle bought this camera back then, one of the first to have Through The Lens metering (TTL) and it served him well for many years.

Sony believes that their updated translucent mirror has life in the 21st century. There are several advantages to such an arrangement. First, a static mirror eliminates the reflex mechanism providing a space, weight and cost savings. Removing this mechanical assembly also allows for a higher frame rate. Next, the electronics measuring the auto exposure remain uninterrupted from frame to frame giving instant responses to varying changes in lighting. Similarly, the auto focus system stays 100% available – a very important consideration for high speed continuous shooting.

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I’ve been interested in photography since I was a very young kid; so much so that I wanted to study photography at college. However, I somehow became distracted and ended up studying something completely different. Yet for these past 50 years, photography has remained a professional interest.

I’ve also been involved with computers for my entire working life. In the early 70’s, there was no such thing as a personal computer. When PCs started to appear about 1976, I yearned for a way to marry the computer with photography. But the movement to digital imagery was slower than even molasses. Of course we know that this has all changed in the past ten years or so and now digital is the standard – having all but replaced conventional film photography.
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Last week I spent a few days in New York City at the PDN Photo Plus Expo. This show is held each year at the Javits Convention Center and attracts not only professionals but avid photographers who are interested in seeing, touching and feeling the newest equipment, speaking to major camera, lens, lighting and accessory makers, watching the many live picture-taking demos given by industry pros and sitting in on dozens of informative “how-to” seminars.

Many thanks to the folks at Lowepro. They generously provided these convenient camera backpacks to all of the members of the press.

I was somewhat surprised at the size of the crowds. With so many attendees, it was slow-moving traffic in the aisles. Lou Desiderio of the PDN Photo Plus Expo management confirmed that more than 24,000 visitors passed through the turnstyles to attend the show. In an otherwise “down” economic environment, this is good news to the many vendors who were exhibiting.
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