Recently I found one balck spot on my picture, I dont know whay the black spot is coming. I am having a Nikkon D90 18-105 lens.

If you want to know if these spots are on the sensor. Or you want to exclude this, You could try this:
Put the camera in A priority. (manual mode). Turn the aperture to the highest setting. Greatest figure like f 22 I can't find the exact figure. It could be it is only 8. Then in a bright light, take a picture of a white sheet of paper. The picture that comes out, should be checked on dark spots. If they are there the spots are on the sensor. If you can't find the spots on the white picture, something else is wrong.

It could be some dust particle on the lens to a faulty sensor. Check the lens if you can spot any abnormality on it and if not, please get it serviced.

How does the camera do when you try to shoot completely on "auto"?

This may sound crazy. We have a coolpix (different model) that took awful pictures from the beginning. Sent it back to nikkon repair center and they said they had to order a new lens...after we got it back (about six weeks) there was no difference. I started looking through all the pictures we had taken before and after and it dawned on me that the distortion was always in the same area of the pictures. Center outward toward the lower left and the exposure was always too long washing out the total image. I took a real close look at the lens front and sure enough found a tiny spot near the center. I tried to wash it off with water,then mild soap with no luck. Feeling like I had nothing to lose I resorted to goof-off and the spot softened and came off. The camera now works great! I hope something like this has happened to you and this helps.

you should be able to clean the exterior of the lens with a clean microfiber cloth or lens cleaning papers (available at even wal-mart). If the spots are in the inside of the lens body, you have to send this in to be cleaned as the camera will have to be disassembled to do it right.

if you black spots then they are more than likely on the eyepiece field lense. dont know what kind of bino you have, if its cheap then probably not worth repair. this problem was usually found in the old zeiss. they used a black wax to seal them, and they are worth repair because they last [email protected]

I would start to diagnosis the problem as follows: When the lens functions properly and is on the camera, the lens aperture is forced wide open by a pin on the camera body pushing a lever on the lens that opens the aperture. As part of the sequence when you push the shutter button, the camera releases its pressure on the spring-loaded lever on the lens, allowing the aperture to close to the setting that the "computer" has determined as correct. You will find this lever on the outside of the black ring that surrounds the rear lens element. With the lens removed, find the lever and make sure that with the lens set to the smallest f-stop (largest number such as f22), sliding the lever counter-clockwise against the slight spring tension, the aperture opens wide and returns to f22 when released. If this is not the case, the problem is in the lens. If this works, then the problem is either in your camera body or in the alignment between the body and lens. Also, the electrical connection between the camera body and the lens is via the five little ball like metal contacts (4 together and one wider spaced) found on the black ring on which the aperture ring is located. If either these contacts or the contacts on the camera body are dirty, the automatic functions may fail. DO NOT use any liquid cleaner. Gently rub the contacts with a rubber pencil eraser, being very careful to hold the camera body or lens in a position that will allow any debris to fall downward away from the body or lens. Do not overdo it. If this does not get you on the right track, let me know what you find and we will proceed from there.

P.S.: Have you made sure you have fresh batteries in the camera?

Nice picture illustrates the problem very clearly. It seems to be out of focus and as it is recorded on your pics ( as I understand), it must be something in the optics. See if you can peer down the lens at the front of the camera to see it there is something trapped between the lenses. You may need a strong light to do this. Shake the camera (gently) to see if it moves.

Let me know how you get on.

cheers

I have a Fuji F700 and when I try to take a picture I only get a balck screen. I can't see picture in preview, either anyoine know where I can get this fixed?

My Nikon was having the same problem with the stationary black spot. I used a can of Dust Off ( the original compressed gas duster). I just removed the lens and held the camera upside down (lens facing the floor) and blew my compressed air inside and my black spot disappeared. Just a thought you might like to know !! Good luck.