If you can comfortably take pictures at 800-speed, your f/4.5 lens becomes effectively a stop faster than it was at 400-speed. Meantime, with its present specs, this lens provides a considerable telephoto range in a very compact package. The camera for a modest price (around $1,100 with a two-lens kit, substantially less for body only) is comfortable to have around, convenient to use, and did we mention it takes great pictures?
We used some of the Olympus high-end lenses on the E-510, such as the f/2.8, 80-200mm. It's a much larger object, but with 800-speed (and even 1600) behind it as the E-510 supplies, an unusually capable resource arises for taking pictures in the dim.
At its price, the E-510 would be among the value leaders in its class, providing a slew of advanced features—the first with the hot three—that puts out great pictures.
But additional things to look at include the E-2, or whatever Olympus will name its successor to the magnificent (but only 5 megapixels in resolution) E-1. We've been seeing mockups for almost a year, with little discussion of its innards. Will it include a processor as powerful as TruePic III? Would a pricier, professional Olympus DSLR extend its view even further into the dark? Now that's a question to shed some light on.