Whether you're glassing to the next ridge, down city streets, or in any other situation when you want to "let your optics do the walking". The 20-x Senator puts you at an effective distance of less than 100 yards from one mile-distant wildlife or other objects. Many hunters and outdoorsmen are discovering these high power binoculars are easy to use, give them a better view and offer a lot more comfort during extended use than spotting scopes. And the 80-mm objective lenses, combined with Steiner's legendary optics, deliver far superior low-light performance. Although the Senators include a tripod mount, they are light enough to be hand held. Depth of field is 60 yards out to infinity once focused for your eyes.