
My Nikon D3100 is broken. I think?
All of the sudden, my camera won't take any pictures on any mode. Whenever I press the shutter release it just makes a really weird squeaking noise and won't focus on the subject. Do I have to take it in somewhere to be fixed?

I bought a MIC-1 for my camera from JJC. I plugged it in to the audio outlet on my camera (Nikon d3100) and put the battery in and turned the mic on. However when I started recording nothing happened to the sound quality when I talked it was the exact same.Am i missing a step? Can someone let me know how to work the audio?
Added (1). It's a shotgun mic.

How to set the exposure time to 15 mins on a nikon d40?
How do i set the exposure time to 15 mins on a nikon d40?

Nikon or canon slr? Which is better for vids?
I need a good camera that will take good pictures and also has good video options. I have a Nikon d3100 and the video recording capability it has is not suited for what I need. I'm leaning toward a canon but need insight on which one is better. I'm also tight on budget so nothin above 750$.

How to choose and filter for nikon d3100?
Hi
i want to choose and filter for my camera
i'm not sure though when it comes to stops (4, 6, 10)
can you please explain it

Please list down the most common known defects of the Nikon D7000?
Please list down the most common known defects of the Nikon D7000?

What's your opinion for speedlight YN-468II i-TTL?
I have a nikon d3100. I'm thinking of buying YN-468II i-TTL
What's your opinion?
its fully auto mode?
Is it a good speedlight

What are good photography books for enthusiasts?
Preferably books about still life, black and white, portraits and people. I really like still life and B&W shoots but I really need to up my game on portraits and people since I also photograph family during occasions. Oh and if they can be downloaded from the internet as well. Author and books title and content would be very helpful. I'm not studying photography but I really love to shoot. I have a Nikon D3000 for now and a 35mm lens and external flash.

Can I use AF Nikkor 50mm f/1.4D with Nikon D3100?
I have a Nikon D3100 and I'm new to photography. I would like buy a 50mm f/1.4 lens. Can I use AF Nikkor 50mm f/1.4D with my camera or shall I buy AF-S Nikkor 50mm f/1.4G which is more expensive lens?

Zoom lens for the Nikon D7000?
I have a Nikon D7000 and I'm looking for a good but cheap zoom lens to go with my 18 - 105 lens that came with the camera. I have found the following lenses that seem affordable. Any advice regarding the suitability and compatibility of each would be appreciated. Thanks.
Nikon AF-S DX Zoom-Nikkor 55-200mm f/4-5.6G IF-ED VR Lens £ 110
Nikon AF-S DX Nikkor 55-300mm f/4.5-5.6G ED VR Lens £ 190
Nikon AF-S Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED VR Lens £ 370