What's The Difference between all these Lens?!

Hey guys, I'm new to all this Photography stuff.
I'm planning on getting a Nikon D3200, With the Lens… The 18-55mm one… I think.I'm not stupid, I just find all these different millimeters with all these different lenses confusing. Why are there different lenses? What does a 14-25mm lens do different than a Kit 18-55mm lens? What does that little F mean? What does 1.8 mean? Whats the difference. Why do you need more than two lens? I dont really understand what it does differently. I am getting this Camera MOSTLY for video shooting, So does the Lens Mostly matter for photos? Or does it do something to the videos as well?
Since i am mostly getting a DSLR for Videos, What would you guys recommend? A Canon 600D or D3200? You guys can answer the camera Question last, please help me understand this whole lens thing.

Read more: What's The Difference between all these Lens?!

Should I bring my dslr camera on holidays?

im wondering about bringing my nikon dslr camera on holidays for one week this summer.I'm concerned about it getting stolen and i wont be getting insurance on it in the meantime… Is the heat from the sunshine going to damage it? Is it going to be hastle carrying it around it around all day… I have not even had the had the camera a year yet so im a little concerned what might happen. I do have an ok Samsung Galaxy s3 which will take ok ish photos

Whats your experience bringing a dslr on holidays? Any tips or advice? Much appreciated and thanks

Read more: Should I bring my dslr camera on holidays?

My pictures from my nikon camera come out blurry on instagram?

I have a Nikon D3100 and my pictures are perfectly fine on every other site, they don't look blurry or pixeled. But for some reason when I try to post them on instagram it makes the pictures really blurry and look pixeled. I've noticed some other people who have Nikon cameras don't have this problem. I have an Android phone and I love sharing my pictures through Instagram but the pictures come out terrible. Any idea what I could do to fix this issue? Did anyone else have this problem?

Read more: My pictures from my nikon camera come out blurry on instagram?

Why do professionals buy Nikon and Canon toys instead of Hasselblad/Leica?

Nikon and Canon toys are just made in Japan.

Hasselblad and Leica are Swedish/German-made.
They are real cameras made for the job.

Read more: Why do professionals buy Nikon and Canon toys instead of Hasselblad/Leica?

I'm looking for a good DSLR camera under $600?

Hello,
At first my to go was going to be the Cannon Rebel T4i, but I heard the cannon cameras dont take great video.

Im looking for a DSLR camera that takes great high quality pictures for self portraits scenery ect. And high qualoty video would a nikon or sony be better? Please give me non opinion answers!
thank you:)

Read more: I'm looking for a good DSLR camera under $600?