Monocular Front Attachment QZD-4
The QZD-4 monocular auxiliary telescope has a single-reticle eyepiece for aiming and measurement during optical-instrument assembly and alignment. A common instrument, it combines a cemented doublet objective and symmetrical eyepiece for good image quality and is widely used in dedicated optical test instruments.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Objective Focal Length | 80 mm |
| Magnification | 4ˣ |
| Exit-pupil diameter | Φ 5 mm |
| Eye Relief | 20 mm |
| Field of View | 10.5 ° |
| Resolution | 7.5″ |
| Eyepiece Adjustment Range | ±5 SD |
| Reticle Graduation Value | 0.1 mm（4 ′18″） |
| Aperture | Φ 20 mm |
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