Canon A-1 Instruction Manual - Page 67

Multiple exposures are not possible when the Motor Drive MA or Power Winder A is mounted on the A•I and in operation. They are possible even when these accessories are mounted if you switch them off and advance the film manually. There are some situations which seem to call fora multiple exposure but which are better handled in another way. One of these is recording multiple bursts offireworks on the same frame. Rather than using the multiple exposure leper, mount the Camera on a tripod, set the shutter speed at "B', and set the aperture ring manually to the appro- priate flstop according to the following table. Hold the shutter open with a cable release until several bursts are registered on the frame. ASA 25 50 100 200 400 (triton 5.6 8 II 16 22 Exposure in Multiple Exposures Generally, the first exposure of a multiple exposure should be of a relatively dark subject so that the image in the next exposure will show up clearly. For best results in multiple exposures, it is also advisable to decrease the exposure for each shot. Depending on the situation, there are several ways to do this. One way is to change the ASA to a higher value as described earlier. In this method, you must first decide how many exposures you want to make on the same frame. If a double exposure, make both exposures at twice the normal ASA; if a triple exposure, make all three exposures at three times the normal ASA; if a quadruple exposure, make all four exposures at four times the normal ASA, etc. Another way to correct exposure is to use the exposure compensation dial at the settings outlined in the table below. Number of Multiple Exposure Compen- Exposures sation Scale Double Triple Quadruple 12 Between 1.2 and 1/4 I4 The method when using the exposure compensation dial for this purpose is the same as that of changing the ASA. That is, for a double exposure, the dial should be set to 1/2 for both exposures and so on. Actually, both methods described above are only general guidelines, and your technique will benefit greatly from experience.