M42 Spacer Shims Kit 0.5/0.8/1.0mm, Telescope Focus Adjustment Rings for Astronomy, M42 Thread Adapter Spacers for Astrophotography, Aluminum Precision Spacers 3-Pack

Specifications Product Name: M42 Telescope Spacer Shim SetSet Quantity: 3 Shims per SetThickness Options: 0.5mm / 0.8mm / 1.0mm (one of each per set)Thread Specification: M42 x 0.75 (Male and Female Threads on Both Ends)Material: AL6061 AluminumSurface Finish: Black AnodizedManufacturing Process: CNC Precision MachinedWeight per Shim: Approx. 5gPackage Contents: 1 × 0.5mm Shim + 1 × 0.8mm Shim + 1 × 1.0mm Shim

• THREE PRECISE THICKNESSES FOR FINE FOCUS ADJUSTMENT Includes 0.5mm, 0.8mm, and 1.0mm spacer rings to help calibrate focus distance and improve sharpness for planetary and deep-sky observation.
• STANDARD M42 THREAD COMPATIBILITY Inner and outer threads follow the M42x0.75 standard, compatible with mainstream telescopes and M42 thread accessories. Easy installation, no tools required.
• PRECISION-MACHINED ALUMINUM CNC-machined from high-quality aluminum with black anodized finish. Effectively reduces stray light interference for clearer imaging.
• ULTRA-THIN LIGHTWEIGHT DESIGN Individual rings as thin as 0.5mm, stackable without affecting equipment balance. Includes storage pouch for convenient outdoor carrying and organization.
• PRACTICAL ASTROPHOTOGRAPHY ACCESSORY Ideal for visual observation and deep-sky photography, enabling fine adjustment of focus distance. A useful addition to any astronomy enthusiast's accessory kit.