轻松掌握手动对焦

<正>现在的自动对焦技术已经很成熟了,我们为什么还会使用手动对焦呢?因为有些时候,这个看似老旧的功能可以大大提高拍摄的自由度,能让你快速得到清晰锐利的画面。在很多情况下,手动控制焦点是合焦的唯一方法。     

爆炸的鸡蛋

想拍摄一幅令人震撼的高速照片?你只需要一个鸡蛋就足以让观众眼前一亮。Dan Newton将和我们分享他的高速闪光摄影技术。     

Impact of a Stereocentre Inversion in Cyclic Lipodepsipeptides from the Viscosin Group: A Comparative Study of the Viscosinamide and Pseudodesmin Conformation and Self‐Assembly

The viscosin group covers a series of cyclic lipodepsipeptides (CLPs) produced by Pseudomonas bacteria, with a range of biological functions and antimicrobial activities. Their oligopeptide moieties are composed of both L ‐ and D ‐amino acids. Remarkably, the Leu5 amino acid—centrally located in the nonapeptide sequence—is the sole residue found to possess either an L or D configuration, depending on the producing strain. The impact of this D /L switch on the solution conformation was investigated by NMR‐restrained molecular modelling of the epimers pseudodesmin A and viscosinamide A. Although the backbone fold remained unaffected, the D /L switch adjusted the segregation between hydrophobic and hydrophilic residues, and thus the amphipathicity. It also influenced the self‐assembly capacity in organic solvents. Additionally, several new minor variants of viscosinamide A from Pseudomonas fluorescens DR54 were identified, and an NMR assay is proposed to assess the presence of either an L ‐ or D ‐Leu5.     

掌握白平衡的奥秘

<正>让你拍摄的图片色彩更加准确,只需几个简单的设置和一些白平衡的知识。一张好照片需要完美的曝光和具有视觉冲击力的构图,但你不能忽略另一个因素,那就是色彩的还原。偏色会毁掉你的照片,丢失细节,画面也会不够通透。在接下来的几页里,我们会教你如何掌握相机的白平衡设置。     

矫正地平线

<正>又把地平线拍歪了?不要失望,只要几个简单的方法就可以拍出横平竖直的照片。正确的拍摄方法按照我们的方法,就能保证你拍出水平的地平线。