An engineering notebook on AI, systems, and everyday experiments.

介绍天文摄影中的drizzle超分辨率技术原理，解释欠采样条件、抖动的作用，以及如何通过多次曝光和亚像素对齐来提升有效分辨率。

从拍摄、清晰到有趣的完整银河摄影指南，涵盖天时地利条件选择、器材和堆栈降噪技巧、慧差处理和创意构图思路。

体验伊尔福正像相纸直接拍摄冲洗：ISO仅3的超低感光度、宽容度极低需要精确曝光、可通过pre-flash降低反差，每张都是独一无二的孤品。

从物理和工程角度介绍色彩管理的原理，解释人眼响应曲线、LMS/XYZ/HSV等色彩空间，以及设备间颜色校准的白点校准和色彩映射方法。

DigitalOcean server incidents and migration to Azure—site layout may be temporarily affected during the transition.

入门胶片摄影的体验分享，介绍不同画幅（135/120/6x6/4x5）、取景对焦方式、冲洗扫描流程，以及胶片画质相比数码的优势与坑点。

镜头色差详解：轴向色差与焦距成正比所以长焦需要APO设计，径向色差与焦距无关无法用APO解决。光圈越大色差越明显，小光圈可减轻轴向色差。

Practical guide to photographing a total solar eclipse, covering time-lapse techniques, bracket exposure for corona details, and economical alternatives using telescopes instead of expensive telephoto lenses.

A hands-on comparison of Hasselblad X1D medium format vs full frame cameras: image quality advantages exist, but speed and usability issues make full frame more practical for most users.

Connecting photography concepts with optics: glasses diopter equals 1/focal length, aperture affects depth of field and diffraction, and macro lens design for close focusing.