35 mm equivalent focal length - Wikipedia
mmCalc on the App Store
Camera Lens Equivalent Focal Length Calculator • Photometry — Light • Online Unit Converters
CCD Focal Length Calculator
Physic 55.4: Optics- Multiple Lenses (4 of 12) The Triple Lens: The Equivalent Focal Length - YouTube
What's a “Normal” Lens? And Why Is My 18mm Lens “Equivalent” to a 28mm? | Shutterbug
full-frame vs crop-sensor comparison
Gullstrand's Equation
GPLI Toric and Spherical Lens Calculator - GPLI
Lens focal length conversions - historical comment and autocritique - Casual Photo Conversations - Photo.net
Lenses size equivalence chart | Focal length, Photography techniques, Camera nikon
mmCALC | The Easy Crop Factor Calculator
Equivalence Also Includes Aperture and ISO
mmCalc on the App Store
DSLR Crop Factor conversion chart - what "lens" you actually shoot with when you're still too poor for a full… | Crop factor, Manual photography, Photography basics
6x7 equivalent focal lengths in 35mm - Medium Format - Photo.net
Crop factors explained - Photo Review
Crop Factor Calculator
Fujifilm GFX Crop Factor and GF Lens 35mm Full Frame Equivalent Focal Lengths
Lens Focal Length Equivalents — Jake Horn Photography
What is equivalence and why should I care?: Digital Photography Review
Understanding Medium Format vs 35mm Lenses and Equivalent Focal Lengths » Shoot It With Film
