Concepts to learn

• Aperture f-stop
• Shutter speed
• Focal length (lens or zoom setting), focusing
• ISO
• White balance (temperature of photo)
• Contrast, Brightness
• Saturation and Hue
• Exposure (underexposed, overexposed)
• Flash compensation
• Exposure compensation
• Various modes of camera (Auto, Aperture priority, Shutter priority, Program, Manual)
• Various effects (sunrise, sunset, landscape, macro, child fast action etc.)
• Bokeh
• Camera sensor
• Metering
• Active D lighting
• Lenses
• Filters (Polarizer, UV, ND, GND)
• Histogram
• Noise
• Camera flare
• Circle of Confusion
• Difference in camera with Full Frame sensor (Nikon FX format) and Cropped sensor (Nikon DX format)
• Photo composition
• HDR photography

Try New things

• Fill Flash
• Using Tripod and reducing camera shake (using remote, camera self-timer)
• Single shot Vs. multiple shots (continuous mode)
• Bracketing
• Use fixed focus lens
• Photos at sunrise and sunset
• Long exposure for photos of waterfall, cars on the road at night, fireworks
• HDR photography
• Macro photography
• Filters
• Exposure control, Using EV
• Panning
• RAW format

Learn New things

• How to read EXIF data after taking a photo
• How to read a histogram and understand its significance
• How to arrange photos in digiKam
• How to edit photos using Gimp
• How to make photo galleries
• How to keep photo back-ups
• How to display photographs online using zenfolio
• How to protect online photographs if you are a professional (copy protection, watermarks, copyrights)

Good websites

• Ken Rockwell [3]
• Cambridge In Color [4]
• Nikonian [5]
• DPR review [6]