For those of us who shoot with off-camera flash while using a light modifier such as an umbrella or softbox, we’re bound to encounter the issue of having the flash not on axis with the modifier. Oftentimes, the bracket that holds the flash and modifier together are separated by at least 4-6″ of vertical space with the flash firing downwards at an angle towards the umbrella.

If we’re using a large modifier, such as a 60″ umbrella, the problem is less pronounced, or if the flash is far enough from the area where the light will be reflecting on. However, with smaller (<40″) umbrellas, the discrepancy of light hitting the top and the bottom of the umbrella will be quite visible.

Read the rest of the article