超焦距或称 泛焦距离，摄影术语。是一个和焦距与光圈有关的对焦距离，当镜头以这个距离对焦时景深最大、可以从相机和对焦点之间的某处（景深前缘）起延伸到无限远（景深后缘）。

从1933年开始，徕卡将超焦距尺刻印在镜头上，此后大部分各厂家出产的镜头或照相机，都有超焦距刻度。见图一，将无穷远对准箭头(将镜头对焦在无穷远),这时f8对准10米，这里10米就是这个镜头在f8时的超焦距；用这枚镜头拍照，如将镜头对焦在无穷远，用f8光圈，那幺从10米以外直到无穷远的物体，在相片上保证清晰。如嫌景深不够，可以收小光圈，例如用f16，则超焦距=5米，景深从5米到无穷远。

In optics and photography, hyperfocal distance is a distance beyond which all objects can be brought into an "acceptable" focus. There are two commonly used definitions of hyperfocal distance, leading to values that differ only slightly:

Definition 1: The hyperfocal distance is the closest distance at which a lens can be focused while keeping objects at infinity acceptably sharp. When the lens is focused at this distance, all objects at distances from half of the hyperfocal distance out to infinity will be acceptably sharp.