The link below brings you to a good tutorial on the ring flash.
Links to Video and text based tutorials
on various aspects of using you camera.
- Cameras
- Understanding Digital Camera Sensors
- Understanding Camera Exposure: Aperture, ISO & Shutter Speed (NEW)
- Understanding Camera Metering
- Understanding Camera Lenses: Focal Length & Aperture
- Choosing a Camera Lens Filter: Polarizers, UV, ND & GND
- Understanding Depth of Field
- Understanding the Hyperfocal Distance
- Understanding Camera Autofocus
- Selecting & Using a Camera Tripod
- Compact vs. Digital SLR Cameras (NEW)
- Camera Lens Flare: What It Is and How to Reduce It
- Digital Imaging Concepts
- Understanding Bit Depth
- Understanding Digital Pixels: PPI, Dithering & Print Size
- Understanding Histograms, Part 1: Tones & Contrast
- Understanding Histograms, Part 2: Luminosity & Color
- Understanding Image Noise
- Understanding Sharpness
- Understanding White Balance
- Understanding Image Posterization
- Understanding Dynamic Range
http://www.youtube.com/watch?v=P71tnHOgUKw