Tv: Setting the Shutter Speed - PowerShot A610, A620, A630 and A640 F 2.8 - 3.2 15 to 1/1250 F 3.5 - 4.0 15 to 1/1600 F 4.5 15 to 1/2000 F 5.0 - 8.0*1 15 to 1/2500 ... F 4.1 - 4.5 15 to 1/1250 F 5.0 - 6.3
On computers running Windows 8.1, if CameraWindow does not start up when a camera is connected, please confirm that Microsoft .NET Framework 3.5 (hereafter referred to as .NET Framework 3.5) has been installed.