I m not trying to bash these instruments. There s enough of that on the Internet already. The Usenet group sci.astro.amateur is a good example. No, this is going to be positive. I want to help these folks with the telescopes they have, not put them down.
Lets tackle the latter first.
Telescope Basics First off, forget about 675 power. You ve got several problems there. Seeing refers to the turbulence of the atmosphere. You can see this yourself without a telescope. Some nights, usually when the sky is not perfectly clear but slightly hazy, the stars will appear as still points of light.