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Focal Length Defined

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Off-site Focal Length Links, User Submitted

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Fri Sep 5

• Focus Pocus: Outsight Photography Depth of Field Calculators

Sun Aug 10

• Pinhole to focal length
• Jon Grepstad - Pinhole Photography: Lots of info and resources

Wed Jul 30

• FOCAL LENGTH AND WHAT IT DOES: Telescopes come with short, medium, and long focal lengths. Why isn't there a standard? What does focal length mean to the observer? Every telescope takes the light from the sky and focuses the light on a final focal plane: the longer the focal length of

Fri Jul 25

• Nikon D80 Portrait Lens Tests: compare background blur with different apertures and focal lengths

Mon Jul 21

• Applet: Lens Combination
• Wide-angle lens - Wikipedia, the free encyclopedia: For example, to get the equivalent angle of view of a 28 mm lens on a full-frame 35 mm camera, from a digital camera with a 1.5 crop factor, one would use an 18 mm[4] lens.

Fri Jul 18

• F-number - Wikipedia, the free encyclopedia: In optics, the f-number (sometimes called focal ratio, f-ratio, or relative aperture[1]) of an optical system expresses the diameter of the entrance pupil in terms of the effective focal length of the lens

Tue Jul 8

• Nabble - Papervision3D - papervision camera formula (was: screen space to 3D space...)
• The 1 Focal Length Weekend Challenge: Here's My Challenge - Shoot at just one focal length for the next couple of days. I'm a Lazy Zoom User Most digital cameras sold today come with...

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Off-site Focal Length Research Links

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