The S5 is quite a bit more than a Point & Shoot. It offers full manual control, including shutter speed, aperture, focus, ISO, white balance, flash intensity, flash sync (1st or 2nd curtain), and the ability to save custom settings. It has a hot-shoe (for external flash with TTL metering), live histogram, and 12X optical zoom. Also, the high-resolution Movie mode is instantly accessible from any other mode, and allows you to use the zoom (a rare feature in still cameras), record in very good quality stereo sound, and shoot stills while shooting a movie.
Also, all digital non-SLR cameras have “Live View”, meaning that you can view a scene on the LCD screen while you are composing your shot. Most digital SLRs (including the Nikon D2) do not have this ability. You look through the viewfinder, compose your shot, press the shutter, and then review the image on the LCD screen.
In the case of the Canon S5, you have one other great feature: a swing/tilt screen that allows you view scenes from a variety of angles. This is useful when (at close range) you are trying to get all of a building in your frame, or you are taking shots over the heads of other people and you want to see what you’re shooting *before * you shoot. Or, you can angle the screen to minimize reflections. Also, you can turn it around 180 degrees and use it to view yourself when you are using the self-timer to include yourself in a shot.
And, finally, the Canon S5 has Image Stabilization (to offset hand shake), and Face Recognition, which optimizes focus and exposure when shooting people’s faces. Both of these features can be turned off.
Okay, but your new Nikon is a far better camera, several steps above the S5. The main difference you’ll notice right away is its responsiveness, especially in low or unusual lighting conditions. You think the shot and it takes it. Also, the zooming is far easier than it is on the S5. (But, I’m sure you’ve already noticed.)
By far the biggest difference is in image quality. Practically everything about the D2H is better than the S5. (The Nikon uses a 4 megapixel sensor vs the Canon’s 8 megapixels, but there are other considerations besides number of megapixels.)
And, the biggest reason for the better image quality is the lenses. Again, not even in the same league. (FWIW, the S5 is considered to have average quality, even for a non-SLR.)
One more benefit of the Nikon is the variety of controls available, on the camera’s body and in the menus, and the (relative) ease of accessing those controls.
I’m sure you’ll enjoy the D2H, but, as you know, it is far heavier and bulkier – some would say “more substantial” and “easier to hold”. And, you’ll need to take at least two lenses (the two lenses that **Zebra ** suggests) and change them when necessary.
I’m curious about how it works out for you.