Why are my Nikon D5000 pictures dark outside?

I have a Nikon D5000 that I just purchased and it takes great pictures, when it's bright outside. Unfortunately, once it gets even slightly cloudy, the pictures begin to come out very dak. I have the shutter speed at 200 (for sports) and the ISO cranked all the way to 2500. Then I set the aperture to 4.3, and the pictures are still dark. The flash isn't on, because it wouldn't do me any good from so far away. I've used other people's cameras and they work so well that it makes it look even brighter than it really is outside. What am I doing wrong here?

Is 17-50 2.8 from sigma lens worth buying?

I have nikon d3100 (crop sensor camera) looking for wide angle lens but already have kit lens which i'm not sattisfied to use them as wide angle. I want something wider so what about 17-50 2.8 from sigma. I think is not much difference from my kit lens but want to read your thoughts

WWE LIVE EVENT- What size cameras are allowed?

Well I have tickets to a Smackdown house show & a RAW tv taping in November and i'm wondering what size camera I can take (to take photos only)

I know video cameras are prohibited/they'll get confiscated but I want to bring a camera like the size of a Nikon D80, a bit more professional since the last house show I went to my crappy digital camera got blurry pictures…

Has anyone had experience with this?

Added (1). My seat is on the tier behind the ringside seats, in the middle - so where Seth & Dean would walk past

What camera setting should I use?

Hi Guy's,
I won't to take a sun set from the bottom of my street but what camera setting should i use i keep trying to get it perfect but at 16 i can't afford photoshop and i have a nikon d5100 with the 18-55 kit lens and a basic 70-300mm lens hope you can help me

Which Camera? Canon 7D, 60D, Nikon D7000?

I'm looking to buy a new camera but I need some help. I've connor my decision to three cameras.
I mostly take photos of people and landscape but I'm interesting in video side of things as well. I know all these cameras would fit the bill but does any of these stand out more?

Help on camera lenses? (NIKON)?

I have a Nikon D3100 which is a DX Format camera, i wanted to know if a Nikkor 50mm lens would work on it or any other DX camera? Or i need to upgrade to an fx camera?

DSLR Camera: Sell Nikon D3100 for Canon T3i 18-35 kit?

So I've had my D3100 for about a year. Has not been droped once and no noticeable ware and tear from what I can see its working perfectly fine and i have the battery, charger, bag, with 55-200 and 18-55 lenses. Now I want the Canon T3i because my friend has one and its amazing… So my question is, should I sell it and save for a t3i with a 18-35 lense or keep my d3100?
Thanks
-logan

Added (1). He's not really better than me. But I did take his camera for a quick shooting and it seem like everything was alot easier to access like the button and controls and his cameras also seems to take better pics than my camera could. Even if we took the same pic with the same setting although he does have an 18-135 and I have a 55-200 so it could be the Lens but I kinda doubt it

My Nikon D3200's Auto-focus stopped working. What should I do?

The switch on the lens is pointed on A not M. I have already reset the settings. I don't know what to do with it anymore. The lens is AF-S Nikkor 18-55mm 1:3.5-5.6G.

Is there any lens that can be used as wide angle and prime lens?

Hi.thinking of buying prime and wide angle lens. Is there any lens that offers this as one instead of buying two different lenses? I have a nikon d3100. All answers are much appreciated

I don't know how to get my Yongnuo flash to work on my Nikon D5100?

I bought a Yongnuo 560 mk2 external flash for my Nikon D5100 and when I put it on the hot shoe and take a picture the flash doesn't go off. I how do I get my camera to send the signal through the hot shoe to make the flash go off?

Thanks in advance for answering.

PS. It's a manual flash, how would I use a manual flash with my Nikon. There must be a way because why would anyone buy it. How do you trigger them off?