The Tamron doesn't seem to preform very well at his long end though, hopefully good enough though.
My father is also considering buying it for indoor shooting.

About the Pentax lens it's a bit better priced here in the Netherlands, you can even picked it up yourself and save money probably.
link € 719,00 = £669,00, they ship to Belgium and Germany for sure so UK shouldn't be a problem either I believe.

John, that can also be a problem with RAW, at least my software doesn't automaticly change the WB when importing them.
Well you can set it that way but it isn't on by standard.

Cedric, GX20 use the same samsung sensor as the k20D and Canon develop their own sensor and I believe the problem was only with Canon, if they used a third party then others would have suffered as well.

btw we never had much problem with the K10D senors and the models before that, they were or most of them all Sony
Now with the Samsung we first got the green line problems with the k20D and now we still have those problems with the k7 so you tell me which one is better or worst?

The 11-16 is far sharper and that sharpness doesn't falloff in the corners, at least even less then with the 12-24.
Also when comparing prices the 11-16 isn't really that more expensive then the 12-24.
Of course you will lose some range but when you have the 16-50, then you've that covered and it's an option you decide for.

I only don't understand why it's f/2.8 although that can be handy indoors with group shots maybe?

Shaking it, maybe the pixels will fall back in place then?

I know that Canon replaced once all the sensors of one of their series because they had a fault in it, maybe if you send it to Samsung they might be helpful?
Simply send a e-mail with one of the photos with exif attach to them and see what they say.

We will use your thread then since matwhittington posted in your thread as well and did my idea of commenting of the photo above.

It depends on how much you weight the value for money.
The Pentax 12-24 is a better lens but cost also 50% more here and even more in the UK.
The Pentax is however a better lens in all respects since it preforms across the whole length of his range, where as the others only are better or coming close in certain parts their range.
Then their also comes the aspect on the appeal of other characteristics that aren't talked about like contrast, saturation and bokeh, I believe Pentax will win all three, mostly because of their coating.

I'm still hoping like some others here for a DA*11-16 but by the looks of it that will never come.

Whatever you want Jack, It might be easier if every photo is in one thread though, but that discussion is up to you.

It's Pentax day today (10th of October).
PentaxForums.com has a topic around to post your photos of today between midnight and midnight in your time zone, and we shamelessly copy that idea.

We're considering to give it a twist though by making it into a competition of some sort.
Probably through a voting system that we will do a Monday but we don't have details about that yet.
Further discussions about that are held here link
If it Turns into a competition then closing date of that is midnight the next day.

Have a happy Pentax day and don't forget to share your photos!

Yeah happy pentax day!

Will make a topic Jack, we will see how things will go.
well it's up, hopefully we do see some photos ^^;