Material and Stability: CNC machined aluminum alloy, lightweight yet, with low vibration, suitable for long-exposure deep-sky photography. Size Options: 310mm (12.2") dovetail plate + 120mm (4.72") mounting ring; 260mm (10.24") + 120mm (4.72"); 400mm (15.75") + 130mm (5.12") optional.
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The ring adapter can't auto focusing :The adapter ring has no electrical connection and diaphragm & focusing are required to be set by manual. 1 X Photography Extension Tube. Thread: Both the adapter are universal M42x0.75 thread.
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1 Night filter (optional). Light pollution has always been a challenge for photographers who like to photograph cities at night. This unpleasant haze makes capturing stars and celestial objects a lot more challenging.
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Material and Stability: CNC machined aluminum alloy, lightweight yet, with low vibration, suitable for long-exposure deep-sky photography. Material: Aluminum alloy. Size Options: 310mm (12.2") dovetail plate + 120mm (4.72") mounting ring; 260mm (10.24") + 120mm (4.72"); 400mm (15.75") + 130mm (5.12") optional.
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Usually it costs about 30USD-50USD.
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eBay
Material and Stability: CNC machined aluminum alloy, lightweight yet, with low vibration, suitable for long-exposure deep-sky photography. Material: Aluminum alloy. Size Options: 310mm (12.2") dovetail plate + 120mm (4.72") mounting ring; 260mm (10.24") + 120mm (4.72"); 400mm (15.75") + 130mm (5.12") optional.
eBay
eBay