Bob, that photo is stunning, the clouds in makes it so mystical.

Stacking filters is never a good idea to begin with, the lens company are very glad when they can drop one lens element in the lens design since quality and the lost of light becomes better. Whit every filter you put on you will reduce quality.

I don't have the lens but stacking them might very well not give any vignetting, the filter size is quite large for such a lens you see so you dont need to worry much. Maybe if you use the lens wide open on the wide end it might be a problem but not when srtopped down or used on the long end. Once again I don't have the lens so dont take my word for it.

The Samsung GX10 is almost the same as the pentax K10D.
You will get over the K200D,
- Prism viewfinder instead of mirror. Prism are most of all brighter and there for better and more pleasant to look through.
- more external controls, no need to go into menu's while shooting.
but you will lose the ability to save in pentax PEF files. Not a big problem but PEF is smaller then DNG the camera makes so you can get more photos on a card.
Everything from pentax will fit on the Samsung except the batterygrip that one is different then the one used on the K10D and K20D.

PS. why not wait just a little longer. When the new pentax is anounced the price might drop of the K20D to clear stock for the new camera.

Since my viewfinder is full with dust because of a blower I bought an artic butterfly and so far I'm content with that. Dust is no problem for it but bigger FOD or smears you can't get away with it for that swipes and the likes are the best.

I'm in Apeldoorn now, my mom lives there and we were in Denmark on holiday when it happend. Some friends of the family where very near to where the car went through the people, luckely they are both okay.

About the photos. The well being of the victims comes firsts and making any photos after...???
I don't know what I should do, if I think about it I wont take a photo of the victims themself but the sadness in the faceses of the people would be powerfull... i think i would go for that in a very discreet manner if i would do anything at all...

Ray, I wouldn't buy those to be honest.
The lens you will put it on cost a lot so it's worth to put a high quality filter on it or else you will most like degrade the quality of your photos, even those high grades do that.

Get B+W or Hoya, they are the best and worth the money.
I like B+W since the rings arent make of aluminium but of brass so they don't stick or get stuck like other filters do.

I'm now having shipment problems with TNT, they gave me the wrong form
I asked for shipement to the UK with insurance and track and trace, so they gave me a form and all looks okay. Now after waiting a week still no package in England. They gave me the shipment forms to ship outside the EU so now the package is somewhere but they cant track it since it went to customs and they cant look further then that
Luckely it's insured but it isn't fun

Education these days, they cant even give you the right forms or they don't know that England is inside the EU...

Yes of course, but you do have a point.

Almost there, you can read that you use an translator. The sentence structure is completely gone.
We keep it English of course but I believe that every English men could read what I wrote in Dutch. It might even be more readable than how some teenagers write these days.

ps. shouldn't you provide a translation as well
The funny thing is it translate correctly back, now I can read it since in Dutch it didn't make sense

Is the subject moving or not?

If it's static the wider you go the easier it is to hold still and also a wide Diaphragm helps, f/2.8 or even lower.
Then heigthen the iso till the shutterspeed is fast enough, better to have grainy photos then moved one.

Normally you wont want a shutterspeed longer then your focal length so with 50mm 1.5x because of the smaller sensor would be 1/75th of a second.
But since you have shake reduction just forget the 1.5x, the SR can handle that and most of the time even more.

Keep in mind to stand solid and with the elbows close to your body to reduce movement. sometimes it helps to shoot in burst since you probable move the camera when pressing the button so the shot one might be better.

with moving subjects the same thing but you got the problem of movement not by you but the subject so you need to reduce the shutterspeed a lot and probable shoot at max iso.