Nikon Macro lenses are widely available at electronic stores and camera shops. These macro lenses can be found at stores such as Best Buy, Henry's and Future Shop. These are also available for purchase from Amazon and eBay.
Yes. The results are better with a macro lens, of course, but it still is not that bad.
One will be able to purchase a Nikon lens pen cleaning system directly from the Nikon camera company's website. One may also buy the item at a camera store who carries the Nikon brand.
You can purchase a Nikon 18-135mm lens online or in store at Target. You can also go to your local camera store to check out the lens the carry in stock if they don't have it at the moment they should be able to order one in for you.
I believe there is a button to the right of where the lenses are on the camera that you can press to eject the lenses.
One might purchase a Nikon 55-200 lens on on Amazon, where it costs a little over $100. Another source would be eBay where it can be found for up to $150.
The Nikon AF-S will be great for macro shots when paired with a good body
On SLRs, macro lenses are specially corrected for extreme close-up work. Nikon brand macro lenses bear the name 'Micro', so there is really not much difference.
Camera shops, Ebay, Amazon
and nikon camera can use a nikon lens, try a D3000, a D50, or a D9
Yes, the sigma is a good lens for the money. One cannot expect professional result with this chepo lens but for an enthusiast it will serve the purpose.
Nikon or Nikor
It depends on the make of the lens and the mount type. Newer Canon lenses have an EF mount while Nikon lenses have a Nikkor mount. Though you can purchase conversion kits to put a Canon lens on a Nikon and vice versa.