![Retinette Goes To Lesotho IV](http://farm4.static.flickr.com/3501/4031686542_71754a876e_b.jpg)
Every so-called camera fault is actually a decision. Older lenses tended to focus on smooth transitions and contrast improvement (contrast was difficult to achieve before lens coatings became common). The lenses were judged on the photos produced. Newer designs are increasingly focussed on sharpness. First central sharpness and now corner sharpness. There is no perfect lens. Typically, a concentration on one area leads to a compromise in another.
The lens on this old camera is not coated. It suffers from flare much more than any modern lens. Flare exhibits itself not just in the coloured blobs we are familiar with but also in a general lowering of contrast as well as some overall colour casts. This could be described as a flaw. On the other hand, an image like this would be impossible without it.