Product Description: 50mm guide scope with bright, wide-field optics puts numerous potential guide stars in view so you'll never have to search for one! Objective Lens diameter: 50mm Objective Lens Hood: 58mm Lens Material: Optical Glass Focal length: 180mm Lens Structure: One Set of 2 Bonded Lenses Lens Coating: FMC-Green Main Tube Material: Metal-Aluminum Guide Hoop Material: Metal-Aluminum Interface size: 1-1/4"(About 31.7mm) External Threads: T2 Male Threads (M42*0.75mm) Focusing System: Stretch Type Quick Focus + Rotary Fine Focus Color: As Shown Package Include: 1 x 50mm Guide Scope 1 x Guide Hoop Note: Please allow 0-2mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! If you really care about these details, pls DO NOT order.

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