The Effect of Distance and Angle on Red Eye in Digital Flash Photography

Overview

Objectives/Goals The purpose of this study was to manipulate angle and distance in digital flash photography to prevent or reduce red eye. I hypothesized that angle and distance would both affect red eye reduction in a positive manner, meaning that by shooting photographs at an angle and taking them from further distances, red eye can be significantly reduced. Methods/Materials The procedure involved taking pictures (with a Nikon CoolPix 4600 digital camera) at different distances and angles from a stationary subject and measuring the percentage of red eye apparent in each digitally enlarged photograph. A low average percentage represented angles and distances that affected red eye in a positive way, by reducing it. Results Results showed that at three feet from the subject and at a 90 degree angle, red eye was the least apparent, averaging in at 58%. However, when the angle was manipulated to 45 degrees at three feet, once again, red eye was the least apparent, averaging in at 58%. Conclusions/Discussion I concluded that there was little difference between the four distances at both angles, with the experimental averages ranging from 70% to 56% with a mere 14% difference. Furthermore, I conclude that by conducting further testing at a large range of angles and distances, more significant results may be found. Overall this experiment shows how angle and distance affect red eye in digital flash photography in both positive and negative ways.

Competition history

• CSEF 2007 Physics & Astronomy · Entry J1628

Resources

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