72° ED Series 20mm Waterproof Eyepiece

The Explore Scientific 72° ED Series 20mm Waterproof Eyepiece is a deliberate choice for bright low-to-mid-power deep-sky observing. Its 72° apparent field gives your eye useful context around the target, while extra-low-dispersion glass helps preserve contrast and control color fringing.Choose the 20mm focal length with purposeThis is not a generic upgrade. The 20mm focal length is tuned for bright low-to-mid-power deep-sky observing, giving you a clear reason to reach for it when conditions and targets call for that view.Optical details that earn their place 20mm focal length for bright low-to-mid-power deep-sky observing 72° apparent field of view Extra-low-dispersion glass for sharpness, contrast, and more accurate color 1.25-inch barrel with waterproof construction Long eye relief for measured, comfortable viewing Add the 20mm when you want a defined role in your eyepiece case—not another redundant focal length. SKU: EPWP7220ED-01.