What is the sun's corona and how can it be captured in a photograph?

[z.js]

I took a picture of the sun on a cloudy day with 2 layers of red cellophane on a normal camera, and edited it on the computer. There is some bright stuff around the sun in the middle. Can this possibly be the corona?

 

[Drakkith]

Unlikely. It's probably the clouds and the plastic making it look that way. This is the Sun's corona:

Note that you typically need an eclipse to be able to image it. Either that or specialized equipment like a coronagraph.