The Wimberley AP-616 Quick Release Foot Replacement has been specifically designed for Sony 600 f/4.0 GM OSS telephoto lenses, providing photographers with a robust and reliable alternative to the original accessory foot. This precision-crafted accessory features an Arca-Swiss compatible dovetail design for seamless integration with quick release clamps on tripods and monopods, ensuring quick mounting and dismounting during photo sessions. The replacement foot incorporates both 1/4-inch and 3/8-inch threaded holes for mounting, offering broad compatibility with various support systems beyond quick release configurations. Engineered with advanced techniques including finite element analysis, the AP-616 achieves an optimal balance between weight reduction and structural rigidity, maintaining lens stability while minimizing additional mass. Dual safety stop mechanisms prevent accidental release from compatible clamps, while integrated flash rail compatibility reflects the functionality of high-quality lens plates. The replacement foot retains the original lens mounting points and ergonomic design, ensuring correct balance and handling characteristics. Professional photographers will appreciate the enhanced safety features and improved quick release functionality, making lens changes between handheld and supported shooting more efficient. The AP-616 represents a successor model in Wimberley's lens accessory range, building on previous designs with refined engineering and expanded compatibility features. This replacement foot is particularly valuable for wildlife, sports, and nature photographers who frequently switch between different support systems and require reliable, secure lens mounting solutions in challenging shooting environments.