Contact the support team from the Nikon web site to get a list of service centers near you. You will be asked to send the camera in, insured. There will be a charge to look at it, and an estimate. You will then either authorize the work or not. The charge for the estimate stands in any case.
Yes, the Nikon D90 Digital SLR has image stabilization.
No
yes, sure can
It depends on your preference. Canon is much more popular in the SLR space than Nikon, but Nikon users swear by their lenses.
The Nikon D7000 Digital SLR is generally acknowledged as Nikon's best in SLR photography. There top seller the D5100 is similar, excluding a few features but is cheaper with a price tag of $849, compared to the D7000 priced at $1,095.
An SLR camera is much higher quality than the Nikon Coolpix. I have owned both and the SLR shoots in much higher resolution and pixels.
Nikon d90 0r nikon d5000 is the best cameras
Nikon
Read the user guide
No
No as long as they have the correct mount.
The Nikon SB-800 is not compatible with Nissan SLR cameras. It is only compatible with Nikon cameras. One could damage their SB-800 flash unit by trying to use it with another camera.