I have got a Deutchesland visa for Germany in India. I want to go Paris too. Do I need different Visa for that?it's written Valid for. Deutchesland Type D
There is no border control between Schengen states. But, since the visa is provided by Germany, it means that the main destination shall be Germany, not France.
If your itenary changes so much that your main destination is not Germany, then its better to apply for new visa, as if they find out, then you will be sent back and you will have much difficulty in obtaining visa to EU in future.
Edit: Since your visa is type D (I am assuming a long term visa.), then there is no restriction for you to visit France.