Astromania M42x0.75 Female Rotation Lock Ring Telescope Adapter, Metal Aluminum Telescope Accessories to Mount to Adapter with M42 T/T2 Male Thread for Astronomical Telescope
M42x0.75 Locking Mechanism: Features a M42x0.75 female thread rotation lock ring with precise T/T2 male thread compatibility; eliminating slippage and maintaining optical alignment during extended telescope use
Industrial-Grade Sealing Standard: Manufactured using precision CNC machining to achieve thread tolerance of ±0.01mm; The components are engineered to comply with the M42×0.75 thread standard, which specifies 42mm thread Diameter and 0.75mm thread pitch
Anodized Aluminum Material: All metal construction, which significantly extends service life of product; Lightweight aluminum construction effectively minimizes load on telescope accessories, making it well-suited for long time astronomical observation
Precision Knurled Thread Design: Engineered with machined knurling on grip frame surfaces to maximize installing efficiency; easily and securely installed even during winter conditions while wearing gloves
Optical Path Extension Design: The 3mm thickness of this telescope adapter maintains to extend short optical length when connecting with other telescope adapters; helping to solve focusing in astronomical observation