What are the best lens for a nikon d90?

I dunno how to use this camera outside automatic. I know that is sad. But I have a book i'm going through.

I was curious about lens. Mine is a nikon dx 18-55mm.

I want a lens that is perfect for headshot photography. Think of actors headshots.
Landscapes
micro such as bugs. I have a ring light so light is not a problem.
and super far away stuff.

now this lens is 18-55 what does it mean if the range is very large or very small?

i don't have much i rather get the best at the lowest price possible. I already know it's expensive.

Any Nikkor AF, AF-I and AF-S lenses will work just fine with your camera

You need to know that to shoot macro shots of bugs, you need a lens like the 60 mm f/2.8 macro lens.

You probably need several lenses.

For headshots, the traditional portrait lens is an 85mm lens, which is about a 50mm in your D90. Your kit lens should cover that, or you could buy a 50mm f/1.8, as it will outperform your 18-55mm (sharpness, low light, etc). Also, some portrait photographers have gone to telephoto lenses (200mm or so) for portraiture as they often provide better bokeh.

For landscapes, you may want to go less than 18mm. Look at the Tokina 11-16mm or Nikon 10-24mm.

And for micro - you need a macro lens with a true 1:1 macro ratio. They typically are found in several focal lengths; 40mm, 60mm, and 105mm focal lengths being the most popular.

For super far away stuff, you need a telephoto lens. A 70-300mm is a good start for an all-around telephoto.

I have a D90, and here are the lenses I have:

1. Nikon AF 10.5mm f/2.8 fisheye.
2. Tokina 11-16mm f/2.8 super wide angle (for landscapes).
3. Nikon AF-S 18-200mm f/3.5~5.6 (normal carry around lens)
4. Nikon AF-S 40mm f/2.8 micro (macro lens for times when I need maximum DoF).
5. Nikon AF 50mm f/1.8 (low light lens).
6. Nikon AF-S 70-300mm f/4.5~5.6 (telephoto lens when I need fast focusing).
7. Nikon AF 80-200mm f/2.8 (sports and extreme portraiture lens).
8. Tokina 80-400mm f/4.5~5.6 (extreme telephoto lens).
9. Tokina 100mm f/2.8 macro (macro lens for bugs - keeps from getting too close).

While you may not want or need the range I have (11mm to 400mm), nor all of the special purpose needs, these are the lenses I picked. I never take all of the lenses with me at any one time, as there would be too much to carry. Rather, I have a couple of strategies for which lenses I use.

My "pro" lens kit consists of:

Tokina 11-16mm f/2.8
Nikon 50mm f/1.8
Nikon 80-200mm f/2.8

I have a bit of a "hole" between the 11-16mm and 50mm lenses, and I originally bought a 35mm lens to cover it, but found I never used it. So I usually "zoom-with-my-feet" between 16 and 50mm, which is easy enough to do as it is usually close up situations.

My travel kit:

Tokina 11-16mm f/2.8
Nikon AF-S 18-200mm f/3.5~5.6

This gives me enough range for 90% of my travel and vacation needs. If I find I need more, I'll throw in the Tokina 80-400mm f/4.5~5.6.

The other lenses are specialty lenses:

Nikon AF 10.5mm f/2.8 fisheye for those times when I want to take photos from an interesting perspective.

Nikon AF-S 40mm f/2.8 micro, or Tokina 100mm f/2.8 macro, both of which are Macro 1:1 ratios. This gives me a lens on both ends of the macro perspective. I use the 40mm when I want maximum DoF (as DoF at macro is very narrow), and the 100mm when I want maximum distance (so I don't scare off bugs).

Nikon AF 50mm f/1.8. Whenever I need a low-light lens.

Nikon AF-S 70-300mm f/4.5~5.6 is for action photos outside in good (daylight) lighting conditions when I need fast autofocusing, which is provided by the AF-S motor. I also use this lens with a FT-1 adapter with my Nikon V1, which gives me an incredible 810mm focal length equivalent.

Nikon AF 80-200mm f/2.8. This is my best lens, and it is great for indoor sports (hockey, basketball) when the lighting is not as good as daylight conditions. As the lens focuses with the camera's motor drive, it is not quite as fast as an AF-S version. I also use it when I want the best bokeh for portraiture, although I do have to step back a bit to do so.

Tokina 80-400mm f/4.5~5.6 which is an extreme focal length telephoto for birds and other far-away distances. I can also use it with my Nikon V1, for an incredible 1, 080mm equivalent focal length. However, since it has no internal focus motor, it must be manually focused - which is not really a problem as a tripod is mandatory for such a focal length - so you are not doing action photos.

Hopefully this will give you some idea of the thought process you should go through to determine your needs. Buying the wrong lens can be a very expensive mistake, so you should think about what you will use the lens for prior to purchase. Of the lenses I have, only the Tokina 80-400mm is not currently made, and may be hard to find.