Is it ok to buy a refurbished Nikon lens?

Someone is selling a factory refurbished Nikon lens and they are selling it for $220 cheaper than the normal on. Is it ok to buy it because it is refurbished or will it not work as well?

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How to take a picture of a room with huge windows letting light in?

I m trying to take a picture of the individual offices and also show the great view they have. The problem with taking the picture is the windows are huge and let a lot of light in. So when I take a picture the view looks great, but the room looks dark.

I have a Nikon D80 DSLR so I can adjust ISO, f stop, manual focus, etc

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