Lens not attached message on new Nikon lens?

"Lens not attached" message on new Nikon lens?
Added (1). I bought a lens on ebay and when I put it on it says "lens not attached", even tho I put it on correctly, it clicks n everything. My kit lens works just fine.
Added (2). Camera is Nikon D5100, lens that doesn't work is 85mm 1.8
Added (3). Is the lens broken? Is there anything I can do bout t?

Read more: Lens not attached message on new Nikon lens?

What is the rate Nikon D5300 In India?

What is the rate Nikon D5300 In India?

Read more: What is the rate Nikon D5300 In India?

My camera viewfinder is black, what do I need to do?

I have a Nikkormat FTn Film Camera, and I have set it up to the best of my knowledge but the viewfinder is black (And the lens cap is off the lens too). What could the problem be? I appreciate any answers as I am new to film.
Added (1). Do I need batteries for it, or are the batteries just for the meter?

Read more: My camera viewfinder is black, what do I need to do?