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.