-Ga / -da Mashruuca shaxanka waa aalad ac ah oo loogu talagalay in lagu qaado sawir shaashad ah oo loogu talagalay baaritaanka aragga. Jaantuska sita disc, saxanka maaskaro iyo tubada tubada ee astigmatic ah waxaa lagu xakamayn karaa garaaca dhammaantood ee lagu bixiyo guddiga hore ee mashruuca.