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3. How to evaluate a lens?<br />
• 3.1 镜头的光学设计,像差<br />
• 色差<br />
• 像差:球差,彗差,像散,场曲,畸变<br />
• 3.2 镜头的加工,材料和镀膜<br />
• 3.3 与镜头有关的影响成像的因素(成像质量) :<br />
• 广角端的桶形畸变<br />
• 广角端的暗角<br />
• 长焦端的色散(紫边,红边等)<br />
• 逆光时的鬼影和眩光<br />
• 锐度(球差,彗差,像散)<br />
• 对比度,暗部和亮部细节<br />
• 色彩还原和过渡<br />
• 3.4 其他因素:
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