Videomaker – Learn video production and editing, camera reviews › Forums › Cameras and Camcorders › Consumer Camcorders › Teleconverter lense › this is chromatic aberration.
this is chromatic aberration. it's like when a prism separates light into colors. you can't easily correct for it. you can minimize it by keeping the subject of interest close to the center. when a lens is designed for a camera it is corrected in the design of the lens and using software. this is a common problem in teleconverter lenses.