The Eagle Optics Energy Moon 8x21 Binocular is a scant unit with a good close focusing capacity as well as a generous apparent field of view. Easily fits in a shirt pocket.
| Prism Type | Roof |
| Magnification | 8x |
| Objective Lens Diameter | 21 mm |
| Angle of View | 7.3° |
| Field-of-View | 383.01' @ 1000 yd / 127.16 m @ 1000 m |
| Minimum Focus Distance | 8.0' / 2.44 m |
| Exit Pupil Diameter | 2.6 mm |
| Eye Relief | 8 mm |
| Interpupillary Adjustment | Not Specified By Manufacturer |
| Dioptric Correction | Not Specified By Manufacturer |
| Focus Type | Center |
| Tripod Mount | None |
| Dimensions | 2.3 x 1.3 x 3.7" / 5.84 x 3.30 x 9.40 cm |
| Weight | 6 oz / 170.10 g |