I've heard it also works with the lens correction of the K7.
But you must agree that the program does that to the RAW file on the computer so you can just as easily do that manually on your PC with the same effect.
Now with JPG you want to have the perfect photo straight out of the camera since every time you re-save it you lose data because of the compression.

It sound sill but don't use high iso (iso400 is probable fast enough) or powerful flash so use a long shutter speed instead.

let me explain that a bit further.
Use every equipment in manual mode so that you've control and understanding what is going on, if you use auto settings things can get confusion and the pulsing light of a night club don't help the light meter so experiment with that.
Use the flash wireless in your hand so that you can change the way the light falls in the subject every time or else they will look all the same, also only use the flash to freeze the subjects a bit but let the exposure go on longer to capture their movement and the surrounding light.
you won't get sharp photos like that but I believe you want to capture the atmosphere of the place right?

Michal I didn't mean it offence either.
A message is a form of content but it does not need to be.
The simplest way is to think about the content of a book, it does not need to have a message per se.
Joe had a good link which describe it better, let me quote a bit out of that.

"Art is form and content" means: All art consists of these two things.

Form means (1) the elements of art, (2) the principles of design and (3) the actual, physical materials that the artist has used. Form, in this context, is concrete and fairly easily described - no matter which piece of art is under scrutiny.

Content, now, gets a little more tricky. "Content" is idea-based and means (1) what the artist meant to portray, (2) what the artist actually did portray and (3) how we react, as individuals, to both the intended and actual messages.

Additionally, "content" includes ways in which a work was influenced - by religion, or politics, or society in general, or even the artist's use of hallucinogenic substances - at the time it was created. All of these factors, together, make up the "content" side of art.

Hopefully that explains it better then I did

I know Joe sorry for that.
Will look him up with fresh eyes tomorrow, I can not look at photos at the moment.

The bird does communicate with singing but yes his brain is wired to do so.
Nothing nature does can be art to say it bluntly.

Nature does not do things because to pleasure us, inspire us and that's what I and my teacher mean I believe that devide things.

John the +1 in camera doesn't work if you shoot RAW but is the best way to do it if you shoot JPG though.

Then the second hand 50mm lenses are very attractive.
Anything secondhand around 50mm to 135mm would be usable depending the space you've.
Please do keep in mind that if they don't have an auto aperture you will lose some shooting options on the camera, also don't forget that most don't have autofocus.

New.
the same as said before anything between 50-135 would do really.
so the kit lens 18-55 is a good one for a very nice price a bit more handy would be the sigma 17-70 for example, that one isn't very expensive either.
or the pentax DA 50-200 might do.

The f-number is quite important here since these zoom lenses don't throw the back ground so much out of focus as some fixed focal lengths can so it depends on what you're looking for.

Maybe the answer is in how sharpening works since it creates the appearance of sharpness by increasing contrast with edges.

So we have two bases now, edges is depend on resolution and we have contrast.
Resolution is depending on how well the lens keep all the colours/light together basicly.
Contrast is also a lens quality so there you have it why things are different per lens.

Maybe not the best explanation or 100% correct but I believe it comes close to the answer you're seeking.

Joe because someone else said it is art it is art?
I still need to look up his photos

My art teacher had a good simple explanation what is music and what not and I can see how it apply loosely to Art.

Music is music when sound is make to enjoy someone. It's badly translate though.
The basic is that a bird can sing so beautiful but it isn't music since he does that to get a mate or bark is territory. And in return someone making horrible sounds on his guitar is making music if he does that to entertain someone.

Like said it can loosely base on other art forms I believe, still it isn't such black and white but do you have something better?

You're all right.

I knew that it is hard to clearly divide the two like John explained with his Martians so lets change it to what you like the most then.

@Joe, the discussion is better to be done in another topic, we can do it with the photo I've showed here or another one if you want. I will leave it up to you if you make a topic or not like the rest said it would be learning full and interesting.

@Michal, message or beauty isn't what content or form means so please don't try to degrade it so with my example.
I would certainly hang some photos on my wall even if the form of it is bad if the content is strong. I do not mean the photo I post here but there are others that you can't describe beautiful but would fit well on a wall.

Thank you Father Ted lets hope the rest can follow me too and yes indeed it's the around the same topic as yours.

Joe everyone is differnt and that is what makes this world so exciting so go ahead it would be good to have a meaningfull discusion.
One thing though keep the terms simple I'm not familiar and confident with the English ones that well but please still use them anyway, it's a good way to learn them.
I will also give a full analyse as best as I can, haven't done that for 6 years now