Product Description: High-Precision M42 to Pentax PK Macro Reverse Adapter Ring Smooth Interface & Compatible Thread: This adapter ring features a high precision lens mount, ensuring flawless compatibility when connecting an M42 lens to a Pentax PK camera. The smooth interface is designed to protect both your camera and lens, allowing for seamless transitions and secure connections without any risk of damage. Perfect Fitment for M42 to Pentax PK: Specifically engineered for M42 lens to Pentax PK camera applications, this adapter guarantees a smooth and secure fit. Made from high-quality aluminum alloy, it ensures a perfect connection without any sticking or resistance, enhancing your shooting experience. Durable & Wearable Construction: Crafted from robust aluminum alloy, this adapter ring is built to endure. We apply advanced craftsmanship to enhance its resistance to corrosion and other abrasive elements often encountered in outdoor photography, ensuring it remains reliable even in challenging environments. Safe and Reliable Design: This adapter is designed to fit perfectly while causing no damage to your lens or camera, making it a reliable and practical tool for photographers who value their equipment. Its precise engineering ensures that your gear remains in pristine condition, providing peace of mind during every use. Extremely Solid and Lightweight: Engineered for a tight and secure fit, this adapter ring is both solid and lightweight. It is specifically designed to eliminate wobbling or cross-threading, ensuring stable and consistent performance in all your photography endeavors. Elevate your photography setup with this high-precision M42 to Pentax PK macro reverse adapter ring. Perfect for photographers who demand quality, durability, and reliability, this adapter allows you to effortlessly expand your creative possibilities. Whether you're working in a studio or exploring the great outdoors, this adapter ring provides the secure and seamless performance you need to capture stunning images.