变焦鱼眼镜头系统具有更大的视场角、更大的相对孔径、更大的反远比的特点。文中的设计过程中，首先,利用平面对称光学系统理论设计了固定焦距的鱼眼镜头初始结构;然后,把此鱼眼镜头的组元划分为前变焦组和后变焦组两个变焦组，并利用了高斯光学理论对整个变焦镜头进行了变焦优化;最后，得到一成像质量良好的变焦鱼眼镜头。该镜头最短焦距8 mm时的视场角为180°，最长焦距16 mm时的视场角为90°，其相对孔径为1/3.5。设计结果表明：该变焦鱼眼镜头系统的调制传递函数（MTF）数值在不同的焦距长度、空间频率为50 lp/mm时均不低于0.45，该变焦鱼眼镜头物镜比其他变焦鱼眼镜头具有更好的成像质量。

The zoom fish-eye lens had the characteristics of much larger field-of-view angle, much larger relative aperture, and much larger anti-far ratio. In the work described in this paper, the initial structure of a fish-eye lens with fixed focal length was firstly designed using the theory of a plane symmetric optical system. And then the initial structure components of the fish-eye lens were divided into two groups, the former-group and the rear-group, and then the entire zoom fish-eye lens system was optimized using Gaussian optical theory. Finally, a zoom fish-eye lens system with good imaging quality was obtained. This fish-eye lens system had a field-of-view angle of 180° with an 8 mm short focal length and a field-of-view angle of 90° with a 16 mm long focal length. Its relative aperture was 1/3.5. The design results show that the modulation transfer function of this zoom lens system at different focal lengths is no less than 0.45 when the spatial frequency is 50 lp/mm. This zoom fish-eye photographic objective lens had higher imaging quality than other zoom fish-eye lenses.