On this topic, do we know if the J-20's ones are retractable too?The J-20s (as in all variants) were most definitely flying with them on.
I was looking back at my photos the other night and was thinking they may be (especially since the screws etc. seem to fit in with the others on the fuselage, & there doesn't seem to be a gap between the top of the lens and the fuselage).
I guess I could have just waited for two more weeks until photos from the Static display at Changchun circulate online, but there's no harm in asking

