I have a couple of unbranded filters - they fit in an unbranded Chinese copy of the Cokin P filter system. Cokin filters fit it just fine but it came with a ND grad and circular polarizer as a kit. So far no complaints, but I will upgrade to Cokin one of these years .......probably.

My son used to shoot air rifle at a local shooting club - he was the area champion twice. He gave it up when he went to study, sold all his gear, which was a real shame I thought. It was a wonderful hobby for him. It turned a hyperactive stroppy teenager into a calm, relaxed young man so you will get no nasty comments from me.
And I used to shoot rats with an air rifle as a girl - they invaded our garden when a nearby stables was demolished.

Rodger I am so envious of you - safari 3-4 times a year wow. I am so looking forward to going again next year. My once in a lifetime trip is going to be at least a twice in a lifetime trip. Africa has worked it's way into my heart.
When I win the lottery I will be of to Africa all the time

sligomd has a K100d not a K10D so soesn't have the dust removal system.
I agree he has to choose a lens that can stay on the camera - I saw one guy in Tanzania trying to change lenses to get a shot of a cheetah. By the time he'd succeded the cheetah was gone. He didn't even try and change lenses in his camera bag, just whipped the lens off, not even pointing the camera down. He was in another jeep to us, but staying at the same camp - the next day he was complaining about the dust on his sensor ruining his photos. Duh!

I took my Tamron 28-300 to Tanzania. I only took one lens because of the dust - and it will also be bad in Namibia.
I found the 300 to be too short, which is why I invested in the Sigma 50-500(Bigma). That will be my safari lens next year.
If you can't get the Bigma then the Sigma 170-500 or 135-400 would be good alternatives, plus a wide angle lens. Be very careful changing lenses though - the dust in Africa gets into everything.
For wide angle landscapes I stitched photos which worked just fine, though I didn't take many - the animals were my main subject.

Pete, relax and enjoy it. For the group photos establish if the couple really want a photo with all the guests on it. If they do then you need to get assertive and get everyone in together as best you can. Take lots of shots, as on most of them someone will be pulling a face or looking the wrong way. By taking several very quickly you should get one of them right.
Get the family groups done, then ask the best-man or brides father maybe to suggest the guests start to move off, then you can take the couple off for their shots.
Don't worry too much about settings - as long as they are in focus you can do a lot in photoshop if you have too.
I am sure they will be happy with whatever you do. There will be others there taking photos too. Make sure they stay our of your shots. Get cross with them if you have to.
Good luck!
Looks like the sun will be shining any way!

try this one:
http://www.shootsmarter.com/

ANother website for you - which has stacks on wedding photography, albeit heavily Canonikon baised, is http://shootsmarter.com/index.html. you will need to register with them but there is lads of info there which could help for your wedding shoot.

Pete, why do you want a 4gig card? It is far better to have more smaller ones. If the 4 gig one gets corrupted that's a lot of photos to lose. Go fo 2 2gb cards, or even better 4 1gb cards.
I can't help with cheap sources of cards in the UK.

I was a bit puzzled by your other questions, as I rather understood you to be doing a photography course, and these are amongst the first things dealt with on a course usually. Never mind, you have some very clear answers now.

Some useful links for you:

http://www.uscoles.com/fstop.htm
www.luminous-landscape.com
http://www.cameratown.com/guides/
http://www.fredparker.com/ultexp1.htm

Maybe they will help answer any further questions.

It is generally cheaper to have your photos printed, especially if you do a lot of them. I don't know which shops do it in the UK, but here in Holland forinstance our local supermarket has an online printing service - you send them off online, and collect and pay for the prints at the supermarket. I use this service most of the time, even for fairly big photos. But if you only print an odd photo or two then print them yourself, once everything is calibrated.

Anyone sent niblue a PM to tell them they've won? Maybe they don't visit that often.