埋首於書堆中的駝鳥 ── 2015 篇

• How Nature Works: The science of self-organized criticality, Per Bak
• Classical Mechanics: The Theoretical Minimum, Leonard Susskind & George Hrabovsky
• Occupy, Noam Chomsky
• Zero to One: Notes on Startups, or How to Build the Future, Peter Thiel
• The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography, Simon Singh
• Pauli Lectures on Physics (Vol.5): Wave Mechanics, Wolfgang Pauli
• Quantum Mechanics: The Theoretical Minimum, Leonard Susskind & Art Friedman
• The Improbability Principle, David Hand
• The Social Contract, Jean-Jacques Rousseau
• 《思考學堂》梁光耀
• 《投行分析師的叛逆宣言》張化橋

雲裳集 ── Open-cell vs closed-cell Cirrocumulus

— Closed cells in the upper and open cells in the lower

— Close-up of the open cells

雲裳集 ── 雨幡洞 ﹝fallstreak hole﹞

── A fallstreak hole in Cirrocumulus (top left of the photo) spotted at dusk on 21-DEC-2010. So unfortunate that a portion of the fallstreak hole was not seen as the view was blocked by buildings (cut from photo).

雲裳集 ── 濃密雜亂狀卷雲 ﹝Cirrus spissatus intortus﹞

── Cirrus spissatus intortus spotted around 1300H, 14-AUG-2011. The photo has been post-processed for perspective adjustment. Note the black dot in the photo near the right edge at around 5/6 of its height. A magnified view of the photo shows that it is an aircraft in the air. Through this aircraft, the size of the cloud is visualized.

Canon PowerShot A70

這部 Canon PowerShot A70 是我第一部隨身機，2003 年買的。當年我對攝影一竅不通，大概明白 ISO 是什麼，但對光圈與快門的相互配合便不太懂了，想學，又想擁有一部輕便小巧的相機，讓我隨身携帶，遇到有趣的東西或美麗的景色，便可拍下來，旅行時也會用來拍風景，對質素倒沒有太高要求：

• 像素：320M
• 鏡頭焦距：35-105 mm
• 變焦倍數：3X 光學 + 3.2X 數碼
• 光圈： f/2.8-4.8
• 快門速度： 1/2000-15 秒
• ISO：50, 100, 200, 400
• 尺寸：101.0 x 64.0 x 31.5 mm
• 重量：215 克

選擇它的其中一個原因是它有手動模式 (M-mode)：
用 4 枚 AA 電，我當這是它的優點，平時可用充電池，外出時萬一充電池沒電也可買普通電來用：
記憶咭是 CompactFlash Type I ，我有三張 ── 16MB(隨機送)、64MB 及 128MB 各一：
當年還買了個原裝(好很貴！) conversion lens adapter (LA-DC52C) 用來加濾鏡玩：
它與我一起渡過了五年的光景，除了雲裳花容、街頭巷尾，也拍過國慶煙花、大坑火龍，亦隨我去過兩次日本旅行，拍下了很多美麗風景，為我記下美好回憶，偶然也拍出一兩張自己喜歡的照片：



自從買了單反以後便很少用它了，近幾年甚至沒有用過。最近從抽屜底找出來把玩一下，發現鏡頭伸縮時「咔咔」聲，幸好操作仍然正常。可能不會再用它了，但有感情，始終也不捨得扔掉它。