[Blue Skies (Jacquie)]

You don't see distance, you see brightness! (which is what you're asking, no?) Remember, the closest star to us, Proxima Centauri, is difficult to see even in a telescope, but the Andromeda Galaxy, 2.2 million light years away can be seen with the naked eye!

You have a 5" which means you should theoretically be able to see down to +13.0 Whether you can or not depends on the conditions of the night and the quality of your optics, so don't be surprised if you can visually only see down to +12.

And then there's the little problem of surface brightness when observing galaxies and nebulae and other diffuse objects - they might be listed as bright but if they are spread out (diffuse) with low surface brightness you will probably struggle to see those things too.