troubleshooting - Why can't I turn the focus ring on my Vivitar 100-300mm far enough to get infinity focus?

I recently bought VIVITAR 100-300mm F5.6-6.7 macro zoom. I use it with Nikon D70S. Here is my problem. When distance between my D70S with VIVITAR and object of photography is 15meters and more, I can not focus on this object of photography. I am in manual mode and in manual focus. Focus is set on infinity - everything less than infinity is more, out of focus. I attach photo of roof, 31meters away from D70S (1/40s, f14, 300mm).

Do you know, what it is going on?

Thank you for answer.