' which originally referred to a small, decorative design or drawing on a book page. In photography, it has taken on a slightly different meaning, but with the same idea of focusing attention on a particular area
Vignetting, also known as “light fall-off” (sometimes spelled “light falloff”) is common in optics and photography, which in simple terms means darkening of image corners when compared to the center. Vignetting is either caused by optics, or is purposefully added in post-processing in orde...
field stop would be. That is, viewing the secondary mirror from off to the side of where the field stop of an eyepiece is, results in a partial view of the primary mirror. Meaning light fall-off proportional to the area of the primary mirror that has been cut off, occurs at that ...
However, compromises still have to be made for such lenses. In typical fashion, Sony designed the lens with a tight image circle, meaning that the area illuminated by the lens barely covers the full-frame sensor. This results in strong vignetting, the darkening of corners and edges compared t...