Ghosting is a form of flair.In fact, ghosting is the only form of flair that can be mitigated by quality lens coatings.
Regards, Bob....
True that some ghosts still have a lot of flair but, joke apart, are you sure lens coatings only improved ghosting? I think it contributes to lower "flare level" of a lens even if lens construction is mostly involved. Or have I been mislead by some readings?
Andre --

