Product Dimensions: The Male thread diameter is M42x0.75mm, the Female thread diameter is M28.5x0.6mm, and the thickness is 3mm,Manual measurements only, please allow slight errors. Compatibility: M42x0.75 Male Thread To M28.5x0.6 Female Thread Filter Adapter For Most Astronomical Telescopes. Function: Solves the thread mismatch problem between filters of different diameters and telescope interfaces, enabling the connection and use of optical accessories. Product Material: This product is specially designed and made of aluminum alloy, ensuring a long service life and resistance to damage. Easy Installation: Direct replacement without adjustment, perfect compatibility, and high reliability.
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