I am new to photography and have just started a photography course.
I am super confused by the different lenses and what everything means.
What do the following lenses mean exactly, and what is the difference between say the lens with one number (mm) compared to the lens with two numbers (mm)?
Nikon 35mm f/2.0 lens
Nikon 50mm f/1.8 lens
Nikon 85mm f/1.8 lens
Nikon 70-200 f/2.8 lens
Nikon 18-55mm DX lens
Nikon 55-200mm VR lens
F/number is the fstop / shutter speed? The lower the number, the quicker the picture takes?