Coupling a compact, palm-sized body with 21mm objective lenses, the UCF R 8×21 provides outstanding optical performance and go-anywhere portability for a wide variety of applications, from outdoor nature observation to indoor theatrical viewing.
Combining multi-coated optical elements with high-refraction BaK4 glass prisms, the UCF R 8×21 assures high light transmission and reflection for a bright, clear image field. It also incorporates aspherical optical elements to deliver a clear, well-defined image with minimal distortion, even at the edges.
The UCF R 8×21 is encased in a durable rubber housing to ensure a firm, comfortable hold and excellent shock-resistant performance.
The PENTAX-original dual-axis eye-distance adjustment system makes it quick and effortless to adjust the distance between two eyepieces, even when you share the binoculars with someone else.
| Models | 8 x 21 UCF R |
| Type | Porro prism, center focusing (Linked-dual-axis) |
| Lens construction | (Objective lens)2 elements in 1 group (Eyepiece lens)3 elements in 2 groups |
| Magnification | 8X |
| Objective lens Diameter | 21mm |
| Real field of view | 6.2° |
| Apparent field of view | 50° |
| Field of view at 1000m | 108m |
| Field of view at 1000 yard | 324ft |
| Exit pupil | 2.6mm |
| Eye Relief | 13mm |
| Relative Brightness | 6.7 |
| Diopter adjustment range | ±4m-1 |
| Eye Width adjustment range | 58 – 72mm 2.3 – 2.8 inches |
| Focusing range | Approximately 2.8m to infinity Approximately 9.2ft to infinity |
| Eyepiece ring | Slide type |
| Body color | Black |
| Height & Width | 83 x 110mm 3.2 x 4.3 inches |
| Thickness | 48mm 1.9 inches |
| Weight | 210g 7.4 oz. |
| Accessories | Eyepiece lens cap, Case, Strap |
