does anybody know a camera with those specification???

Can somebody help me??

I realize that every camera has its own advantages.

1- I desperately need a camera : that captures very high quality photos with great details (i can zoom in the photos when i am viewing them later)

2- A camera that you don't have to change its lens every few minutes.

3- Somewhat compact not too big or too heavy.

Point number (1)-image details- ::is my top priority
point number (2)-lens changing-:: is my second priority

I take many kind of photos (Nature-Flowers- streets bustling with people - cities landscape)
My budget is from under 800$

Please help