64Set the ISO speed (image sensor’s sensitivity to light) to suit theambient light level.1 Press the <Z> button. (9)2 Set the ISO speed.While looking at the top LCD panel orin the viewfinder, turn the <6> dial.ISO speed can be set within ISO 100-12800 in 1/3-stop increments.With “A” selected, the ISO speed willbe set automatically (p.65).ISO Speed Guide (No flash)Z: Setting the ISO SpeedISO Speed Shooting Situation Flash Range100 - 400 Sunny outdoorsThe higher the ISO speed,the farther the flash rangewill be.400 - 1600 Overcast skies or evening time1600 - 12800,H1, H2, H3 Dark indoors or nightIf [8C.Fn II -3: Highlight tone priority] is set to [1: Enable], thesettable ISO speed range will be ISO 200 - 12800 (p.215).Using a high ISO speed or shooting in high-temperature conditions mayresult in more grainy images. Long exposures can also cause irregularcolors in the image.When you shoot at high ISO speeds, noise (horizontal banding, dots oflight, etc.) or irregular colors may appear. Also, if you shoot with the ISOspeed range upper limit expanded to H1, H2 or H3 with [8C.Fn I -3: SetISO speed range] (p.208), noise and irregular colors may become morevisible.With [8C.Fn I -3: Set ISO speed range], the ISO speed range can beexpanded from ISO 50 (L) to ISO 102400 (H3).COPY