Specifications :
Parameters | ||
Aperture size | 50mm | |
Focal length | 275mm | |
Focal ratio | F5.5 | |
Objective lens | Triplet air-spaced APO (including two ED glass) | |
Limiting visual magnitude | 10.3 | |
Tube length | 196mm(Dew shield contracted) | |
Gross weight(including dovetail plate) | 1.0kg | |
Rear-end thread type | 1.25" visual adapters | |
Standard package items | a 50EDPH OTA, 2-section 5cm M48 extension tube ,a 70mm Vixen-style dovetail plate |
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