where did you focus? The image looks unsharp averall. f2.8 is really not the best choice for such shots - if you wanted some bokeh before and after the sitting bench, a 50mm f1.8, or even tele from larger distance will be better suited for this task. Wide angle Lenses have basicaly big problem with bokeh, unless you shoot really short distance.
elsewise it is prefferable to shoot landscapes on higher f-settings, focusing on hyperfocal length.
blowing up is always bad idea, pentax aready meters pictures a bit darker - getting details out of shadows, is much easier than of blow-ups.
the Corel Photo-Paint X4 has a really bad camera raw editor, with an old Photoshop or Lightroom you will be much better off. Stuff like local contrast, or advanced settings which can help you with that blown up sky, are simply lacking in the corel raw editor.
the way you have PP, donīt really need a RAW file, you would have achieved same result in JPG with any editor.
in fact i think smth. went wrong with camera raw lab on corel, because a RAW file has MUCH more information which will be adjusted, and you have just the same amount of information before and after.
try some other software, to see if you are getting better results, otherwise, donīt force yourself into RAW, it is more important to Shoot write - the PP software is for adjusting and not fixing, so you can adjust only small details.
There is no way you can rescue a picture - a bad shot picture stays a bad shot adjusted picture. you can distract from the bad things, but unsharp things will stay unsharp, bad composition, will stay bad composition, and blow ups will mostly stay blow ups.
---------- Post added 11-11-14 at 11:48 ----------
best way to show you the difference.
https://www.pentaxforums.com/forums/26-mini-challenges-games-photo-stories/27...nge-127-a.html
Last edited by Vitalii; 11-11-2014 at 04:01 AM.