| / | / | DY-1 |
| Optical System | Infinite Optical System | ● |
| Viewing Head | Seidentopf Binocular Viewing Head, Inclined at 45°, 360° Rotatable, Interpupillary 48-75mm | ● |
| Eyepiece | Ф30 Wide Field Eyepiece WF10×/22, Eyepiece Tube Diameter 30mm | ● |
| Wide Field Eyepiece WF15×/16 | ○ | |
| Wide Field Eyepiece WF20×/12 | ○ | |
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