My Nikon D7000 ISO Problem

I bought a new Nikon D7000 when i set this setting…

RAW format
Aperture - f17
iso - 200
focus - auto focus
metering - matrix
white balance - auto

when i set this my picture became dark nothing there can't see anything! What's wrong? Even on jpeg format also
lense is nikor 55-300mm

Change the white balance.

Read the manual that came with it, or better still buy a book, take a course.

You now have in your hands a camera that allows you to take the photographs that you want to take, and not the ones it's pea brained silicon mind thinks you want!

f/17 is rather a small aperture, so you'd have to balance that with a long exposure time (which could increase shake) or a higher ISO (which will increase noise in the image).

Start by playing with the camera in it's appropriate "scene" modes, then progress to the "P"rogram mode, before graduating to "A"perture and "S"hutter priority modes and then for ultimate control "M"anual. It's important to remember these modes will not correct your mistakes, if you do something dumb it'll show in the photographs!

A dark image file equals underexposure. You obviously used a fast shutter speed in poor lighting conditions. Learning the Exposure Triangle which consists of Aperture, ISO and Shutter Speed will help you understand what you did wrong.
http://digital-photography-school.com/learning-exposure-in-digital-photography

Aperture, Shutter Speed and ISO all work together to produce a correct exposure. You can't simply set an ISO and Aperture and then ignore the camera's light meter and set whatever Shutter Speed you want and expect acceptable results. Doing so will produce the very underexposed image files you experienced.

Knowledge of the legacy "Sunny 16 Rule" will also enlighten you. It states: "On a sunny day set your aperture to f16 and your shutter speed to 1/ISO." Here is a "Sunny 16" exposure chart using ISO 200 on a sunny day:

f32 @ 1/50 sec.
f22 @ 1/100 sec.
f16 @ 1/200 sec. "Sunny 16"
f11 @ 1/400 sec.
f8.0 @ 1/800 sec.
f5.6 @ 1/1600 sec.
f4.0 @ 1/3200 sec.
f3.5 @ 1/4000 sec.
f2.8 @ 1/8000 sec. D7000 maximum shutter speed.

This site provides guidelines for determining low light exposures:
http://www.calculator.org/...osure.aspx

Choose the Scene 'Domestic interiors at night, subject lit by campfire or bonfire' and ISO 200 and then look at the Aperture/Shutter Speed recommendations.

f1.4 @ 1/30 sec.
f2.0 @ 1/15 sec.
f2.8 @ 1/8 sec.
f3.5 @ 1/5 sec.
f4.0 @ 1/4 sec.
f5.6 @ 1/2 sec.
f8 @ 1 sec.
f11 @ 2 sec.
f16 @ 4 sec.

NOTE: f17 is less than 1/3 stop slower than f16 so there would be little difference in the shutter speed at f17 vs.f16.

How acurate is this site? I used the Scene 'Distant view of city skyline or floodlit buildings' and ISO 200 for these pictures:

100mm @ f11, exposure for 30 seconds.

200mm @ f11, exposure for 30 seconds.

Here is a link to a printable table showing Shutter Speeds, Aperture (F-Stops) and ISO in full, 1/2 and 1/3 stops.
http://www.photographyuncapped.com/articles/photography/iso-shutter-speeds-f-stops

If you're having trouble understanding the Owner's Manual and how to use the light meter watching this video tutorial should help: http://www.nikondigitutor.com/eng/d7000/index.html

Firstly - there's nothing wrong with your camera - it's because you don't have a clue how to use it.

You can't just plug random numbers in & hope that you'll get a correctly exposed image!

Your camera has a light meter - I suggest you use it.

You need to learn the basics of exposure.

As it is dark it is clearly underexposed - you need to let more light in. Which means;
- opening up the aperture (SMALLER f number)
- slowing down the shutter speed (of the important exposure parameters, you haven't even mentioned what it was)
- increasing the ISO

If you can't be bothered to learn how to use a decent DSLR properly, then take it back & buy a nice little point & shoot instead.