Canon 155 A- Manuals

Attaching to the Camera 1. Turn the main switch off. 2. After loosening the tightening nut of the attachment leg, insert the attachment leg all the way into the camera’s accessory shoe. If it is not pushed completely in, correct electrical contact may not be made. 3. Retighten the nut to lock the fl...

HOW TO USE WITH THE CANON AE-1 AND A-1 The Speedlite 155A can be used in three ways. I. AE flash photography with Canon FD lenses. II. Automatic flash photography with Canon FL lenses. III. Manual flash photography. These three usages, though somewhat simi­ lar, are explained separately below. I. AE...

aperture are set automatically and proper exposure is obtained from the amount of light reflected back from the subject. Preparations for AE Flash with the A-1 or AE-1 Aperture Keep the aperture ring of the lens set at the “A” mark. * In the case of the A-1 it does not matter if the AE mode selector...

Shutter Speed 1. The shutter speed is set at B when B is used. 2. At all other speeds it is automatically set at 1/60 sec. Setting the ASA Film Speed Because the guide number of the flash will change depending on the sensitivity of the film being used, be sure to set the ASA film speed correctly. If...

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Switching the AUTO/MANU. Switch This switch is used to set the prescribed apertures coupled with AE flash photo­ graphy. There are two aperture settings for AE flash photography: the red position and green position. (The MANU. position in the center of this switch should be set when you perform manu...

14 Limits of the Auto Working Range Once you have chosen an aperture by setting the AUTO/MANU. switch to the red or green position, there is only a certain range of shooting distances which will give correct exposure. The correct shooting distance range is called the auto working range and is indica...

setting of the AE mode selector and the AT dial. This is possible only when the AE ex­ posure is within the AE coupling range. Once the pilot lamp relights, the camera will automatically switch back to AE flash photography. This means that you can shoot continuously if necessary while the camera alt...

Viewfinder Information and Warnings Viewfinder information is displayed as you depress the shutter button halfway after the pilot lamp comes on. Proper flash exposure is assured unless an exposure warning appears. 1. A-1 Display fi 0 Selected Mode Shutter Flash Charge Ssgnai Flash Control Aperture M...

shutter speed is set to “B” on the camera. When the pilot lamp lights up, F will be displayed to indicate charge comple­ tion. The aperture selected in the automatic mode on the 155A will be displayed. 2. Exposure Warnings When the aperture selected on the 155A is larger than the maximum aperture of...

18 AE-1 Viewfinder information Once the flash is charged and the pilot lamp glows, the meter needle will swing to the aperture pre-selected on the 155A. If the pre-selected aperture is outside the aper­ ture range of the lens, either the under-ex­ posure lamp blinks or the _ meter needle enters the ...

there may be a very rare occurrence where the pilot lamp will light up while the shutter is in operation if the flash is charged. If this should happen, the frame will be improperly exposed. Precautions in Automatic Flash Photography In some cases AE flash photography may not be suited to your subje...

in uneven flash distribution. n. Automatic Flash Photography When the AUTO/MANU. switch is on AUTO, it is necessary ito set the aperture manually when using an FL lens, (or when using the flash on the AT-1 or AV-1). Setting the aperture manually can also be done when using an FD lens on the A-1 or A...

consideration the auto working range, (see pp. 13-14). 3. Manually set the flash-selected aperture, or a different one if correcting exposure, on the lens aperture ring. Viewfinder Displays and Warnings The A-l’s digital display will include the same information as in AE Flash (p. 16) with the addit...

Setting the AUTO/MANU. switch at the back to MANU. places the 155A in the manual mode. When using the A-1, AE-l" AT-1 or AV-1, the shutter speed is set auto­ matically as in automatic flash photography. The aperture must be determined for each change in shooting distance either by guide number c...