Canon EOS 5 - Multiple Exposure and Bulb Mode

10. Multiple Exposure
When taking multiple exposures on a single
frame, you should decrease the exposure
value for each exposure using exposure com
pensation (refer to page 33).
Number of multiple
Compensation
exposures amount
2 exposures -1.0
3 exposures
-1.5
4 exposures
-2.0
The above values should be used only as a
guide. The actual compensation amount re
quired depends on the shooting conditions
and should be determined by prior testing.