How to fix my focus?

Okay so I just got a new camera, a Nikon D3100. When I press the shutter-release button half way down it won't focus. Does anyone have any clue how to fix this?

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Camera can only take pictures sometimes?

I'm using a Nikon DSLR. I noticed that the Fxx/x thingy which i think is the aperture, becomes F --/- . There are usually digits after the F to show the amount of light but it becomes blank ( - ) sometimes and that is when my camera won't capture pictures. I can take many pictures at a time and the next second, I can't ( When the F becomes blank ) This happens at any light intensity.

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Best lens for Wedding photography. Nikon D5000?

I have a nikon d5000. I know it's not the best camera, but what's a good lens to shoot in low light (Weddings)? Right now I just have the lens that came with the camera and it's kinda grainy. I just need something that works well in low light with minimal noise if ISO is cranked up. I have a speedlight but the photos still look grainy. I want Sharp, not grainy photos.

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Is the new Nikon 20mm F/1.8G faster than the 24mm F/1.4G?

Is the new Nikon 20mm F/1.8G faster than the 24mm F/1.4G?

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Nikon 18-200 mm or 70-300 lens for sports?

I am looking at upgrading my camera (I currently have a Nikon D50 and want to get a D7000). I currently have a Quantaray (I know it's cheap, but what we could afford) 70-300 lens, a Nikon 18-70mm and a Nikon 50mm fixed lens. I take a lot of pictures of my girls soccer games and just a variety of family pics or food pics for my blog. I'm looking at two different kits (this seems the best way to go for me). One has the Nikon 18-200 lens, and the other has a 70-300 and 18-105. I hate to lose 100mm if it makes a huge difference when shooting sports. I'm just not sure what is the best route for me to go.

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Who makes a better camera sony or nikon?

Who makes a better camera sony or nikon?

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Is HAMA STAR 62 04162 a good tripod?

I am looking forward in buying a tripod for my nikon d7000 and i dont know what i should buy…

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Why won't my Nikon D3000 appear under devices on iPhoto?

When I plug my camera in iPhoto generally opens automatically and asks to import my pictures, however this time it isn't. I have restarted my computer, plugged my camera in fully, turned camera on and off, and fully charged my camera's battery. I've successfully imported pictures tons of times before and am very confused about why this is happening. I just got back from a trip and really want to upload my pictures. Please help! :)

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Nikon D3100? Nikon D90? PENTAX K-x?

Which would be the best to get for my first DSLR camera? I have a FUJIFILMF72exr now but I would like something a tad more advanced with plenty of options, great features, and a wide range of exchangeable lenses. I would like a good amount of fps and pixels. I would like to be able to take good landscape photos and macro shots. If I should be looking at different brands I'm open to anything! Thank you!

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Best Nikon lens for high school sports (basketball, football, etc)?

I have a 18-55mm 18-55mm f/3.5-5.6 Nikon Lens and the 55-135mm. Which would work best for high school sports on my Nikon D80? Mainly basketball. Also, if there are any better lenses, please, do tell!
Thank you!

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