Cheap wide angle lenses?

What could be a cheap but effective wide angle lens? I like to focus on landscapes and at times star trails.
Shooting on a Nikon D3200.

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Wireless trigger for nikon speedlite?

Just wondering if I can buy a wireless flash trigger for my neewer speedlite. I'm just starting to work with flash and don't really know if it can be connected to a wireless trigger?

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Suggested Camera Settings?

I will be taking some "mugshots" of my local High School Fall sports teams in a few days. They will be taken inside of the High Schools Gym. After past trials, I always have huge issues trying to take photos in the poor/weird gym lighting, They always end up extremely noisy and/or the color is really off. So, what are some suggested settings (ISO, WB, etc.) to use to get better quality photos? Also, should flash be used?

Equipment that I have: Nikon D5200, Nikon SB-700 Speedlight, Nikon DX AF-S Nikkor 18-55mm 3.5-5.6G lens.

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Windows 10: Why can't I import photos from camera?

I have a D5100 Nikon and when i connect it to my PC via USB, a box pops up telling me the computer can't find the device. When I try to open up the D5100 through "This PC", it says there are no files on it. I have never had a problem with my camera before and importing to any other computer.

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