I just bought a Nikon D3200. My first DSLR. Am using a 50mm f1.8D Nikkor lens. Now, at ISO 200, I took a few test shots and though the images look fine on the small screen, as soon as I view them on my laptop, immediately I feel the pictures to be a touch grainy. And on zooming in 1:3, the grains become very prominent. Now, I am very new to this, so I dont understand if that is noise, or is that just supposed to be so. I have uploaded a small portion of the picture. To me, the background seems noisy. The exposure for this was 1/60th of a second at f/1.8. And the face was out of focus. Yeah, it is manual focus on D3200, so I'm having a hard time focusing. but that's another issue. So, my question is, is this noise? Or am I just over obsessing? And if it is noise, what is causing it? Is the sensor faulty?
Photograph is unedited. Straight from the chip.