否则，可能会出现渐晕放大了。
文章同时给出了计算渐晕系数的新方法。
Meanwhile a new method to compute the vignetting coefficients has been given.
渐晕和变形都纠正了这种速度镜头出色。
Vignetting and distortion are both corrected excellently for a lens of this speed.
点击这个按键将根据当前镜头数据重新计算每个视场的渐晕因子。
Clicking on this button will recompute the vignetting factors for each field based upon the current lens data.
渐晕特效例子。注意屏幕的边角区域是如何变暗、模糊和颜色分离的。
Example of Vignetting. Notice how the screen corners get darker and more blurred and also show color separation.
针对R-C系统的特点，考虑轴外渐晕的影响，推导出主、次镜内遮光罩尺寸设计的约束公式。
The constraint formulas for designing the geometries of primary baffle and secondary baffle are deduced when taking account of vignette of R-C system.
叙述一种用于测试大口径、长焦距光学系统杂光系数、渐晕系数、像面照度均匀性等光学参数的检测方法。
A method is introduced for testing stray light coefficient, vignetting coefficient and image surface uniformity optical system with large aperture and long focal length.
叙述一种用于测试大口径、长焦距光学系统杂光系数、渐晕系数、像面照度均匀性等光学参数的检测方法。
A method is introduced for testing stray light coefficient, vignetting coefficient and image surface uniformity optical system with large aperture and long focal length.
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