[DrDespair]

Hi there, I already posted this as Site suggestion, but was encouraged to do an article:

As a beginner I'd really like to have a collection
of Issues/Problems/etc you can have with a specific type of gear.
with Pictures that clearly point out the problem along with a likely solution.

for example: Now THAT's Chromatic aberration (pic) and that's the same without (pic)
CA is easy, ok....

But what's „Koma“? Is that Flare or something else? Is that the camera or the lens?
would be the usage of Lenshood help here or is the Lens

Good Idea?
If so, i'd post some of my wierder results