The field of 3D reconstruction and tracking is rapidly advancing, with a focus on improving accuracy and efficiency in various applications such as industrial inspection, surgical vision, and astrophotography. Recent developments have led to the creation of novel frameworks and algorithms that can handle complex scenarios, including unknown camera poses, multi-zoom image sets, and feature-deficient conditions. These innovations have the potential to revolutionize fields such as robotics, healthcare, and astronomy. Noteworthy papers in this area include: MZEN, which proposes a multi-zoom enhanced NeRF framework for 3D reconstruction with unknown camera poses, achieving significant improvements in PSNR, SSIM, and LPIPS. Surg-InvNeRF, which presents an invertible NeRF architecture for 3D tracking and reconstruction in surgical vision, surpassing state-of-the-art methods in 2D and 3D point tracking.