I am quite new to photography, but spent some days understanding aperture, timing, zoom and ISO. 

Now I see the values printed on the Canon Powershot G15´s lenses, and I can´t interpret them. 
I assume that the values are mainstream without anything odd. It reads:

**6.1-30.5mm // 1:1.8-2.8 // 5x Zoom.**

First value: I always considered 50mm to be "normal", and values like 18mm to be wide-angle. That would make that cam a fisheye?

Second value: I expected something like f/2.8-f/8, with higher numbers adding depth of sharpness but losing illumination. Would this lens give me bright, blurred picture?

I guess I am confusing things, but can´t see how.