Is this a point & shoot or a DSLR? Such spots are not unusual with a DSLR. I use a "dust reference photo" with my DSLR when the specks are few and I clean the sensor after the specks become numerous. As for my point & shoot cameras, I spot the images in LR4 or PSE10 if the images are especially good.
"Great things are not done by impulse but by a series of small things brought together." Vincent Van Gogh
As the others have said, it appears these are typical dust specks on the sensor. You will notice them more when shooting at small apertures, such as f/16, f/22, etc., and when they are against a plain, light colored background, like the clear sky, light colored wall, etc.
It happens and can be dealt with. There are numerous references here and elsewhere online if you just search for sensor dust or sensor cleaning.
Here is one comprehensive post you might start with:
I have had a D90 for 4 years, and a D7100 for 3 /12 months -- and I still have never seen a spec in a photo -- I have looked carefully, I have taken photos of white surfaces -- still cannot find anything!!!
Am I missing something -- is my camera "defective"?? (never mind, I should just be happy I can't find any right?)
Hello Dennis, Same here. I have had the D90 four years now and my D7100 for almost a year. I have not had to clean the sensor on either. I guess I have been lucky, too. I try to be careful when changing my lens. I did have my sensor cleaned once on my D70s several years ago. I changed my lens on the beach in some pretty high wind and ended up with specs. Brent Melton
Sat 15-Mar-14 08:56 PM | edited Sat 15-Mar-14 09:01 PM by ajdooley
Ryan -- I assume you have a DSLR since you posted in the D7000/D7100 forum. As has been said, it is virtually impossible for anything on the lens to show up as a spot on an image. Rather, that's either a defect in the sensor or much more likely, something that has gotten inside of your camera and settled on the sensor. If you never remove you lens, it may also be oil from an internal mechanism part. From the uniform size of the spots in the last image, my guess would be oil. Owning neither of the D7000 family of cameras, I am unaware of that being an issue, as it has been for D600 owners.
Oh... before I go further, welcome to Nikonians. I suspect you'll get an answer here. Please go back and fill in your profile -- especially in this case, your equipment list. But the more we know about you the better we'll be able to help you.
There are are several places you can get a sensor professionally cleaned, or where you can learn to do this yourself.
Again -- welcome. You're going to be hard pressed to find any questions you can't get good answers on here. This is a great site with 99.9% people who simply want to help you enjoy your Nikons better.