User manual CANON A1

[. . . ] Not For Resale ­ Free Download at http://www. joe-chan. com/manuals Not For Resale ­ Free Download at http://www. joe-chan. com/manuals INTRODUCTION Congratulations!You are now the owner of the most exciting and advanced camera on the market. Canon has good reason to have unbounded confidence and pride in the A-1. Embodied in this camera are the qualities of the finest SLR cameras and into it went the most sophisticated electronics technology available in the world today. [. . . ] The camera employs LED circuits to eliminate the need for any extra illumination of viewfinder information. Except when using a flash or the exposure memory switch when the LED maintains constant brightness, the Not For Resale ­ Free Download at http://www. joe-chan. com/manuals degree of LED illumination changes in four stages depending on the brightness of the subject seen in the viewfinder. When the subject is brighter, the LED brightness is slightly higher, and it is slightly lower with a darker subject. As a result, the LED maintains an almost consistent degree of brightness to the human eye. The viewfinder information signal is transmitted to the display every half second. Accordingly, in rapidly varying light conditions, the changes in aperture or shutter speed will be indicated slightly behind time. This is a concession to the adjustment limitations of the human eye which in no way affects exposure timing. Cancelling the Viewfinder Display With the A-1, you have the option of turning off the viewfinder display altogether. This can be done simply by turning the viewfinder display lever to the white dot. Metering is taking place and the shutter can be released for a correctly exposed image even when the display is switched off, but it saves battery power and gives you absolute freedom to focus and compose the image undisturbed. ­53­ Not For Resale ­ Free Download at http://www. joe-chan. com/manuals Numerals and Characters Composing Digital Readout in Viewfinder Up to the first four digits from the left in the digital readout show shutter speed data ranging from 1/1000 sec. and faster will be displayed as a whole number as they are on the AT dial so that an indicated shutter speed of 500 in the digital readout stands for a shutter speed of 1/500 sec. and slower will be displayed as a whole number followed by a second mark ( ") so that an indicated shutter speed of 8 " in the digital readout stands for a real shutter speed of 8 sec. When you are in 4 sec. W 1/4 sec. W The next two digits following the first four from the left for shutter speed data are reserved for aperture data. The possible apertures to be displayed in the digital readout range from f/1. 2 to f/32 even though the minimum aperture it is possible to set on the AT dial is only f/22. The aperture data in the digital readout is displayed in 1/2 f/stop increments, giving numerical values standing for the dots on the aperture scale of the AT dial. An indicated aperture of 9. 5, for instance, in the viewfinder stands for the dot between f/8 and f/11 on the AT dial aperture scale. These half f/stops are approximations which are not always exactly halfway between the full f/stops. f/9. 5W Although both shutter speed and aperture are indicated in the viewfinder in each 1/2 step increment, they are actually controlled by the camera steplessly for greatest possible precision. There are other possible displays, including M, buLb, F, bu F, and a flashing EEEE EE. "M" is the last digit on the right in the digital readout. It appears when the camera is not set for AE control. "F" or "bu F" supplements or replaces the shutter speed data in the digital readout when the camera ­54­ aperture priority AE and the camera is calculating the shutter speed, it is possible for intermediate shutter speeds that are not on the AT dial to show up in the viewfinder. In this case, you may see such shutter speeds as 750 (1/750 sec. ) or 0" 7 (0. 7 sec. ) displayed in the viewfinder. [. . . ] Red LED flashes on and off to indicate its operation. Flash Synchronization: X-synch at 1/60 sec. ; FP- and M-synch at 1/30 sec. Flash Coupling: Accessory shoe has contacts for directly-coupled flash units and automatic flash control contacts for automatic exposure. JIS-B (PC) type flash terminal with shock preventive rim on front of body. [. . . ]