29❚❚ Detaching the LensBe sure the camera is off when removingor exchanging lenses. To remove thelens, press and hold the lens releasebutton (q) while turning the lensclockwise (w). After removing the lens,replace the lens caps and camera bodycap.A No Memory CardIf no memory card is inserted, the controlpanel and viewfinder will show S. Ifthe camera is turned off with a chargedbattery and no memory card inserted,S will be displayed in the controlpanel.A The Write Protect SwitchSD memory cards are equippedwith a write protect switch toprevent accidental loss of data.When this switch is in the “lock”position, the memory card can notbe formatted and photos can notbe deleted or recorded (a warning will be displayed in the monitor ifyou attempt to release the shutter). To unlock the memory card, slidethe switch to the “write” position.D CPU Lenses with Aperture RingsIn the case of CPU lenses equipped with an aperture ring (0 307), lockaperture at the minimum setting (highest f-number).Write-protect switch16 GB