My 8x50 RACI finderscope nails that niche. I've thought about upgrading to one of the nicer Stellarvue ones (or an Svbony guidescope, if I can verify that there's the correct amount of focuser travel to handle visual use). I think I would prefer binoculars if I had a proper mount f...
150mm is 3x magnification and so on. Simply divide the maximum focal length by 50 to get the magnification. As a point of reference, a good pair of binoculars will usually have a magnification in the range of 8x – 12x.