
I'm looking into a new slr camera, and i've got it down to nikon and canon. For ou guys personally, which of the 2 brands do you prefer? And i've got some old nikon lenses in storage, so if i were to get a nikon it would be the d90 or up. What do you think is the canon slr that can be best compared with the nikon d90?

How to use an external flash on the nikon d3000?
I've got an external flash and i've attached it i just don't know what to do next like how to get it working and all that.anybody know how?
Added (1). It doesn't have instruction i got it from a friend but don't worry about it.

Step-up or step-down ring adapters?
Am new in photography and i need some help. I have a nikon d5000 with an 18-50mm lens (52mm ring), and 70-300mm lens (62mm ring). I wanted to buy filters that i can interchangeably use with both. What if just buy a one size filter so i can use it both on the 52mm and 62mm rings (as above) and use a stepping ring adapter? Would i buy a 52-62mm step-up ring adapter and 62mm filters? Or a 62-52mm step-down ring adapter and a 52mm filters?

18-55 nikkor lense that comes with the nikon d3000, do they zoom?
I'm saving to buy the camera and a girl who bought it told me this lense doesn't zoom

A DSLR camera that would work with older lens?
I consider myself an amateur photographer, I currently own a Nikon D40 and I find AF-S lens to be a bit expensive. A just bought a Nikkor 35mm f1.8 for 180£. Looking at other AF-S lens I find them expensive to the point of inaccessible. I would be interested in some 10-24mm but even Tamron are expensive.
Now my question: if I was to get a new body what should I look for? Meaning some DSLR that would work with older lens which I'm to find cheap on ebay. Autofocus function is a must and if I had a choice I would stick with Nikon.
Thank you
Added (1). I've tried manual focus and it is a lot harder.a lot of hit and miss
Added (2). I'm not much interested in telephoto. So if i was to buy one all-round lens id would go for a cheap 18-200, and i know tamron suffers from softness.
i'm more interested in widelens, low light and fish eye lens.
Added (3). Thanks zack and photoace, answers getting better and better

Adapter for Nikon camera to fit Pentax lens?
I need to get an adapter so i can fit a standard Pentax lens for my Nikon D90, i live in the UK where can i get one? I need it by next friday!

Just bought a new Nikon D5000?
And I would say the battery lasts for about three to four hours if I'm taking pictures non-stop! When I got it like 3 days ago, I charged the battery for about two hours. The intructions say that that is the time needed to fully recharge it. But shouldn't it last longer? Did I do anything wrong? Should I have charged it the first time longer? Please give me your feedback! And also how much pictures should I 4GB card hold? I thought about 900, but it only holds like about 300?!
Please answer all the listed question!

Would this camera body and lens combination work?
Nikon D90 (body) + AF-S DX VR Zoom-Nikkor 55-200mm f/4-5.6 IF-ED (lens)

Nikon VS canon? What you guys think?
Canon 550D or Nikon D3100?

Is there any way I can get the effect of a fish eye lens without actually having the lens?
I want to take a picture of a broad street with this effect. The camera I'll use is a nikon d90 (i think!) i wondered if there was anyway to achieve this effect with a normal lens (i only know the very basics of using it), or through editing on photoshop.thanks!
Added (1). I tried the "spherize" tool on photoshop, but it doesn't distort the whole picture, only a circle in the middle. Is there anything similar to this that might work?