Such thing as the perfect picture does not exist
I don't know, it sounds like commercial talk Ultra-secret method that can make your otherwise boring shots really stand out!

There are two parts of photography really, one is the technique and that's something you can really learn but the other is the "artistic" value of your photo and that's something you can not learn but you need to develop.
If you know the technical aspects than these courses are not for you, you should be looking at more specialized and more advance courses.
Richard I've seen your photos on Flickr and I would look for the more advance courses.

Calumet have some of those courses link
This one might be something for you link he has these kind of outings monthly almost.

At least that's my view on things but do what you feel is right.

No need for that RR, Sigma has done everything for you and there is a profile for all modern sigma lenses.

I think you're out of luck

Yes all sigma lenses are support by the program what John says, I wonder if it would also come in the new lightroom.

btw the distortion of the Sigma at 10mm is quite strange not many correction program can handle that I believe.

Great photos Ems and I love the mono's, still Dutch windmills are better though

highlight and shadow recovery can not be done with ISO 100 for some reason, most likely dynamic range like Anne said

Do they have one specially make for the k7?
I think your best bet is one of the universal ones you stick onto your camera instead of clip-on, this one might fit link

No reason not to buy a ist DS, you can convert that one to infra-red camera

Have you set the dioptre right of your viewfinder?
Simply defocus the lens and then adjust the dioptre till you can see the information in the display sharply.
That's the last thing I can think about besides that you need to calibrate the AF.

I only have 4 lenses so I think I'm doing al right.