Originally, a "Bill" from PictureCode said it was possibly the lens reaching the sensor limit. This is the only time I've seen this. It doesn't occur with any other convertor. But, its a moot point now since, this Friday, I went over to the "darkside" and bought the Nikon D800e. PN v1.1.1 is an improvement; lots better. I just upgraded for another year. I appreciate everyone's input.