Power zoom function

It should. Nikon lenses are both backwards and forward compatible. Depending if you have an older or newer lens than camera, some of the automatic functions may not work or may not be available. Worst case, you will be able to use your lens in the manual mode.

You can zoom in to a map or satellite image by pressing 3 on the numberpad (Figure 9), or zoom out by pressing 1 (Figure 10). Multiple presses will zoom you closer in or further out, respectively.
Above is how to Zoom In & Out, below is your user and troubleshooting manual for your convenience. Anything else to do with the Zoom function is inside.
http://www.sonyericsson.com/cws/download/1/597/640/1233745022/C510a__UG_AE_1218_9504_1_12.pdf

Zoom :

• 3 x digital zoom (automatic or manual)
• Travelling-ZoomTM function : Always be in the frame with this unique feature which tracks your face and even enlarges the field of view if there is more than one person in the frame. All completely automatic, just look at the web cam!

The above tells me that you can have automatic or manual 3x digital zoom. Go to the manual mode for the digital zoom and problem might be solved.

Possibly a intermittent connection in the control buttons or the ZIF (Zero Insertion Force) connector from the controls to the main PCB.
Take it in for servicing, they will do a trial by substitution (swap out control) and lubricate the connector.
There isn't really anything you can do to fix with this sort of problem.

Cheers.

The camera is unable to focus properly in low light at long focal lengths. You might have to throw some light on the subject with a flashlight until the camera locks in the focus or resort to focussing manually.

1) What camera body are you using?

2) I do not understand your assertion that it automatically zoomed in. Zooming is a manual function. The automatic functions of your lens pertain only to focusing on of the subject so that your picture is sharp and ensuring that the correct amount of light is admitted so that you have a correct exposure.

3) Are you sure you were turning the zoom ring and not the f-stop ring? The zoom ring is labeled 200 on one end of the scale and 55 on the other. It is also the widest ring on the lens barrel. When you rotate it, the physical length of the lens will lengthen as you rotate it clockwise (viewed from behind the camera) and shorten as you rotate it counter-clockwise.

4) For reference, at 200mm the angle of view on your lens should be 10 degrees and at 55mm about 40 degrees.

Canon currently makes super Telephoto lenses from 300mm to 800mm and a number of zoom Telephoto lenses from 28-300 to 100-400. You can also special order a 1200mm lens from Canon at a cost of $99k! (There are only about 20 such lenses made so far.)

You can also get a 1.4 or 2x teleconverter to further increase the power of a telephoto lens. However, the cameras are unable to auto-focus when the minimum f-stop exceeds f/8, which can happen when you use one (or both) of the teleconverters on these longer lenses, so you have to manually focus the lens.

You can also get telephoto lenses from other manufacturers such as Tamron and Sigma that are built to work with Canon cameras. However, the Canon lenses are generally regarded as the best quality.

According to manual you should use the navigational d-pad left and right arrows. If it does not zoom in it is probably because resolution is at the maximum allowed and you cannot zoom in any further.

The D-490 Zoom shares the following features with the D-460 Zoom: •Olympus 5.4mm to 16.2mm (equiv. to 35mm to 105mm on a 35mm camera) lens: all-glass, 8 element, 6 groups, 2 aspherical lenses •Automatic TTL focus system •Macro mode allows the camera to auto focus as close as 8 inches •Automatic aperture selection: f2.8 to f8.0 wide, f4.4 to f12.6 tele •3x image magnification inspection mode •Panorama mode: Allows multiple pictures to be "stitched" together to create wide views •NTSC video output to TV •12-second self-timer •8MB SmartMedia card included •Built-in, pop-up intelligent flash: Auto low & backlight, red-eye reducing, off, fill-in, slow-sync •Automatic white balance control or 4 manual settings (daylight, cloudy, tungsten light, fluorescent light) •Automatic ISO sensitivity or manual selectable ISO settings •Uses 4 AA size batteries. AC Adapter is available as an optional accessory In addition, the D-490 Zoom has the following functions and features: •2.1 megapixel resolution (1600 x 1200) •Sequence mode - up to 5 shots in HQ and up to 45 shots in SQ mode (1.3fps) •Motion picture mode - up to 60 seconds of QuickTime movie (.mov) format (w/o audio)

The D-460 Zoom shares the following features with the D-450 Zoom: •1.3 megapixel resolution - 1280 x 960 pixels •Olympus 5.4mm to 16.2mm (equiv. to 35mm to 105mm on a 35mm camera) lens: all-glass, 8 element, 6 groups, 2 aspherical lenses •Automatic TTL focus system •Macro mode allows the camera to auto focus as close as 8 inches •Automatic aperture selection: f2.8 to f8.0 wide, f4.4 to f12.6 tele •2x digital telephoto mode •3x image magnification inspection mode •Sequence mode: Up to 10 images at 2 frames per second intervals (SQ mode only) •Panorama mode: Allows multiple pictures to be "stitched" together to create wide views •NTSC video output to TV •12-second self timer •8 MB SmartMedia card included •Built-in, pop-up intelligent flash: Auto low & backlight, red-eye reducing, off, fill-in, slow-sync •Automatic white balance control or 4 manual settings (daylight, cloudy, tungsten light, fluorescent light) •Automatic ISO sensitivity or manual selectable ISO settings (125, 250, 500) •Uses 4 AA size batteries. AC Adapter is available as an optional accessory In addition, the D-460 Zoom has the following functions and features: •Industry standard icons for button labels and operation menus •Easy to use jog dial and button design allows easy menu navigation •2 compression ratios are now selectable in SQ mode •Selectable Sharpness: Normal or Soft •Selectable Memory Mode Setting: Reset camera settings at power-off or Retain all camera settings •2 Olympus brand CR-3V long life lithium batteries included. Provides 20-30 times the power/life of alkaline batteries