Your camera settings have nothing at all to do with the RAW image that you cough out, they only represent what that camera would spit out should you be shooting in jpeg. I've written this often...
"I've been confused by that exposure compensation thing because the histogram was all over the place when imported into LR.
Since starting to shoot in manual mode, utilizing Live View's histogram, those problems are a thing of the past. Technique is:
That LV histogram is based on a jpeg rendition of your image so you need to "neutralize" (slide them to the left) all your "picture style" settings.
Set-up your LV to display a RGB histogram and blinkies whenever it's opened. Now it's a simple matter to adjust SS, F/stop, and ISO to
push" that histogram to just shy of the right side, a technique referred to as "Exposing To The Right".
Now simply input wanted/needed SS and f/stop and use the ISO to push that histogram to the right or...any combination of the three settings."
Having said all that...heed what Tom said
In my opinion, there is nothing that you could do to make that scene look good with the drab light that was on it. No camera settings, and no post processing magic, will make up for the fact that the light was so ordinary and drab. In this case, it is not really a matter of exposing properly, or adjusting any setting. Rather, it is a matter of spending time waiting for the light to be at its best. In fact, waiting for the light is 90% of landscape photography. Or maybe 99% would be more accurate.
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