When the mirror has a device for adjusting its distance from the base, the device must be set in the position in which the distance between the housing and the base is shortest;
Kui peegli kaugust alusest on võimalik vastava seadisega reguleerida, tuleb seadis paigutada sellisesse asendisse, mille korral peegli kaitsekatte ja aluse vahekaugus on lühim.