I've had some experience with 20-60X60mm spotting scopes. At 45-50X during daylight the image is fine. Crank it up to 60X and things get noticably dimmer. I'm not saying don't get a 60 power scope; or that if you do, get at least an 85mm objective. I just want you to realize that at maximum magnification, even on a bright, sunny day, things get dim as the exit pupil narrows. I've used a pricey Redfield at my previous job; and I've got a much cheaper Trekker I take to the range sometimes (at 100 yards, I find a decent 12X scope will generally let me see the holes in the paper). Both work well for my purposes.