Exercise Hotspots

• In a swimming pool, with either a compact or SLR, using the widest angle of lens you have available together with a flash on a flash arm, switch the flash to On and position it so it's visible to your eye just inside the viewfinder on your camera.

• Select f11 on your camera, and the fastest shutter speed that will synchronise with the flash. Set the flash to manual full power and take a shot.

• Now review the LCD. You will see the appearance of snow/backscatter immediately in front of the flashgun. Whilst still leaving your flash visible in your viewfinder, position it at an angle at which, in theory, you would not expect to see backscatter.

fig. 6.46 The fan coral is 1 m wide and was taken in clear water on a drop-off in the Maldives. I used my Tokina 10 mm—17 mm fisheye zoom on the 10 mm end. I have intentionally positioned each of my Inon Z220 flashguns within the frame. You can clearly see the hotspots emanating from them.

fig. 6.47 I have now moved the flashguns 30 cm further away from the fan coral but maintained the same angle. The hotpots from both flashguns are no longer visible and the edge of the frame is clean. Backscatter, or the hotspot, is often caused by the flash being too close to the picture area as opposed to being at the wrong angle or in the wrong position.

fig. 6.47 I have now moved the flashguns 30 cm further away from the fan coral but maintained the same angle. The hotpots from both flashguns are no longer visible and the edge of the frame is clean. Backscatter, or the hotspot, is often caused by the flash being too close to the picture area as opposed to being at the wrong angle or in the wrong position.

Take another shot and review the LCD. The flashgun must be visible in the LCD for you to see the effect clearly. I suspect this hotspot is still visible!

• Try once again, but change the aperture on your camera to f22 and see how the hotspot diminishes. Now set it to f5.6 and notice it increase.

Digital Photography Mastery

Digital Photography Mastery

Insider Secrets Revealed By the Pro Showing You How to Become a Professional Photographer! Discover The Secret Tips & Techniques On How To Be A Professional Photographer, Start Producing High Quality Pictures and Skyrocket Your Photography Business Income Revenue To The Roof TODAY! You're About to Discover the Powerful Strategies and Method to Start Taking Sharp, Clear and High Quality Pictures Like the Professional Photographer Without Paying a Single Penny to the Expert!

Get My Free Ebook


Post a comment