Askar 50P Petzval Astrograph

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Aperture size 50mm Focal length 190mm Focal ratio f/3.8 Objective lens Quadruplet petzval APO（including one piece of SD glass） Total length 147mm(when the dew shield is contracted) 182mm(when the dew shield is stretched) Format specifications APS-C format（optimized for 1-inch sensors） Gross weight（including tube ring and dovetail plate） 1.4kg Rear-end thread type M48 adapter (with M48×0.75 filter thread) Rear-end connection distance Support 50-65mm range (Recommended connection length is 55mm) Standard package items A 50P OTA，a manual Show more