The Pro Max gets iPhone's longest optical zoom ever, using a first-of-its-kind tetra prism design.
Pro Max 光学变焦范围创iPhone纪录，独创的四重反射棱镜功不可没。
Optical zoom
原声例句
苹果2023年秋季发布会
潮流科技大事件！
Three times optical zoom as well as five times hybrid zoom, and the night mode is absolutely awesome.
三倍光学变焦以及五倍混合变焦，夜间模式绝对棒极了。
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This may include a rear-facing periscope lens, which allows for more optical zoom, and a titanium casing to make the device up to 15% lighter and thinner.
这可能包括一个后置潜望镜镜头，允许更多的光学变焦，以及一个钛外壳，使设备重量减轻15%，厚度更薄。
潮流科技大事件！
There is one wide angle with an F 1.7 aperture and then there is a telephoto camera with an F 2.4 aperture which is going to give you two times optical zoom.
其广角镜头光圈为F1.7，长焦镜头光圈升级至F2.4，可实现两次光学变焦。
苹果2023年秋季发布会
For iPhone 15 Pro Max, we're using the extra size of the larger iPhone to introduce something unique: 4x optical zoom at 120-millimeter focal length.
对于 iPhone 15 Pro Max，我们利用较大 iPhone 的额外尺寸来引入一些独特的功能：120 毫米焦距下的 4 倍光学变焦。
中文百科
变焦镜头 Zoom lens
（重定向自Optical zoom）
变焦镜头（英语：zoom lens）指可以改变焦距的镜头，光圈有些会随变焦增加而缩小这些镜头被称为“变光圈镜头”，这些镜头称为“恒定光圈镜头”。因其快速拉近或拉远，能立即改变构图，以方便快捷见称。但图像质素一般较等焦距的定焦镜头差。
变焦镜能分成多个类型，由超广角到广角，标准（50mm）到远摄。类似28-200mm的变焦镜头由于其焦段的适用范围很广，可取代多个镜头，减轻旅游时携带的负担及更换镜头的不便，因此有时被称作“旅游镜头”或“天涯镜（一镜走天下）”。
英语百科
Zoom lens 变焦镜头
（重定向自Optical zoom）
![Unusual trailed-zoom view of the VLT.[5]](/uploads/202501/31/Unusual_trailed-zoom_view_of_the_VLT0031.jpg)
A zoom lens is a mechanical assembly of lens elements for which the focal length (and thus angle of view) can be varied, as opposed to a fixed focal length (FFL) lens (see prime lens).
A true zoom lens, also called a parfocal lens, is one that maintains focus when its focal length changes. A lens that loses focus during zooming is more properly called a varifocal lens. Despite being marketed as zoom lenses, virtually all consumer lenses with variable focal lengths use varifocal design.