- Is this a out-of-camera JPG or raw?
- If a raw, what steps did you take to finally generate the JPG?
- Did you post process the JPG and what did you do?
- If you shot as a JPG only, what picture style settings did you have defined?
I ask these questions because if you raise brightness up after the fact either on the raw or JPG, you will create noise. If you sharpen this, the noise effect will be amplified.
What is the exif here too? Did you actually shoot at f1.4? If so, then your DOF is very thin, and you won't have full head detail, but just a small sliver. You would be better service shooting at f4, for example, at ISO 400, with EC set to +1/3, IMO.
Now, if what you mean by noise and graininess, you mean the strange patterns of the background, that is called bokeh, and the 50 1.4 is not known for rendering smooth out of focus areas, its bokeh is a bit twitchy as you can see. So if that is what you are talking about, that is all a result of your lens, and not your camera. Based on what I read from your other thread, I don't think you mean noise in the conventional sense, but rather the bokeh and chromatic effects of the lens. You mentioned in the other thread about how you use smaller aperture numbers, you start to get effects around edges of subjects, etc and based on your picture above, you really mean the background rendering. Again, if that is what you are trying to get across, that is all on the 50 1.4 lens. It is one of the reasons I no longer shoot with it, along with its AF internal design that fails easily.