Nikon D3000 Problems. Blurred and spotted?

I have a Nikon D3000 I purchased years ago. I have a spot re-occurring on the top of my photos. It's with both lenses. It occurs on the view finder as well as when I upload them to my computer.

Along with having the spot show up the left side of all my photos that I take horizontally are blurry. I'm unsure if it could be the lenses or if there's something in my settings.

If anyone could help me with this I would be GREATLY thankful.

Will nikon kit lens 18-55mm 3.5-5.6 work as good as nikon 50mm 1.8g or nikon 35mm 1.8g?

Going to be taking some group shots outside early afternoon (plenty of light). Should I use 18-55 3.5-5.6, the 50mm 1.8g or the 35mm 1.8g (all nikon on a nikon d5000)? And should I go with single point focus AF or Auto area?
Probably 2-3 rows of people about 10 wide.
I'm thinking the 35mm at around 5.6 from approx 28-30 feet away, any suggestions?

What kind of Nikon Lens should i use?

I was looking into getting some sport photography and day-day use Nikon lens for my D90. Please could you tell me what kind of lens can produce this quality photos.

https://toughmudder.com/content/2014-capital-region-sunday?page=1
https://toughmudder.com/content/2014-wisconsin-saturday?page=1
https://toughmudder.com/content/2014-capital-region-sunday?page=9
https://toughmudder.com/content/2014-wisconsin-saturday?page=8

Is 25k shutter count okay to buy for a Nikon D7000?

Planing to buy a used Nikon D7000, on the ad it says "under 25k shutters". Is that fine?

Cinema lens for both cameras?

I currently have a Nikon D3100 for taking pictures but i'm planning on getting the Eos Rebel Canon T5i… However i do not have one yet, but i really want to get a Cinema lens. Are there cinema lenses that would be able to work on both for the time being, until i primarily switch over to the new camera when i get it for filming?

Nikon D3100 Viewfinder is blurry?

Hi, so I got a nikon d3100 and for the longest time I have only been using the lcd screen when taking pictures because the viewfinder is just blurry.
I know there's a knob next to the viewfinder, but it doesn't really help as far sharpness. It looks really blurry and is really unusable as far as taking pics. The glass seems to be clean so I don't know if its just not aligned or something.

Please let me know if there's anything I can do to fix this problem within settings or any other way.

Problem taking pictures with Nikon D3100?

Hi, so I recently started having problems taking pictures with my nikon d3100. Every time I take a picture, areas of the picture come out pink. This also happens when am looking to take the picture through the screen, so it shows pink even before taking the picture. I reset all settings, re-updated the firmware, and still get the problem. This happens even when I take pictures in full auto mode, it seems to happen in every mode I choose. The thing is that this never happened before so I'm just wondering why it is happening now.
My suspicion is that it may have to do with exposure because the areas that come out pink are usually the brightness in the room( I don't know why they would show as pink though). I took some pictures inside a room, the walls in the room are white and only some areas appear as pink, so am not too sure if it does indeed have to do with the exposure. When I used flash, it comes out almost all pink, this doesn't make much sense since the room is too brightly lit. I have tried changing settings, resetting them, used different sd card. I don't know if it may just be an option within the settings that am missing.
Please someone help me.
I attached a picture here and also have a zip folder with some pictures taken( jpeg, raw) if anyone wants to go deeper and look at the settings I used. Http://nikonproblem.weebly.com/
Thanks. Added (1). It looks like no one is going to answer my question, but I was able to fix the problem. What I did was to focus on an area that appeared pink so that everything was pink in the lcd screen. I took a picture of it and the pink went away, can't remember if I used flash or not, I don't think I did. I don't know if this is the way to fix it, but it worked for me and will try again the next time this happens.

Can I use remote shutter release and focus recompose?

Need some help please! Later today my family and I are going out to take some family pics. It's just going to be us so we will be using a tripod and remote shutter release. Is there a way to focus recompose while using a remote shutter release? We're all pretty tall and so we want to focus towards the top of the photos. If we us the center focus or the one right above it then our stomachs will be in focus. Nikon d5000, Thanks

What settings do i put my nikon d3100 on to film in slow motion?

What settings do i put my nikon d3100 on to film in slow motion?

Lens not attached message on new Nikon lens?

"Lens not attached" message on new Nikon lens?

Added (1). I bought a lens on ebay and when I put it on it says "lens not attached", even tho I put it on correctly, it clicks n everything. My kit lens works just fine.

Added (2). Camera is Nikon D5100, lens that doesn't work is 85mm 1.8

Added (3). Is the lens broken? Is there anything I can do about t?