Digital Camera Articles

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Camera Lens Physics

Lens Performance Testing: Evaluating a Camera Lens

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I've done plenty of imaging performance testing on a variety of systems, from millimeter wave through UV. Until very recently, such testing required expensive…
lensfocus

Lenses and Pinholes: What Does "In Focus" Mean?

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In introductory physics, the optics unit often teaches about virtual and real images, focal lengths, indexes of refraction, etc. Some questions that are…
cameralense

New High Performance Ultra-wide Angle Lenses

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Note, unless otherwise specified, all focal lengths are in terms of the 35mm image format.Recently, there has been a flurry of new high performance…
tripods

Digital Camera Buyer's Guide: Tripods

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 A tripod holds a camera still while the shutter is open, preventing motion blur.  The tripod must be able to maintain this stability in…
dslr

Digital Camera Buyer's Guide: DSLR

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 I'm ready for a DSLR!A: These cameras were originally designed for professionals.  Users of these cameras are expected to already understand…
digitalcamera3

Digital Camera Buyer's Guide: Bridge Cameras

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 I've never owned a camera, but I want to get a 'real' camera (that doesn't cost too much). I've owned an entry-level camera already and…
digitalcamera2

Digital Camera Buyer's Guide: Compact Point and Shoot

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 I've never owned a camera (besides what is in my cell phone and laptop). I want to take pictures at parties and post them online or email…
digitalcamera1

Digital Camera Buyer's Guide: Introduction

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 First, congratulations! Camera technology has advanced to the point where a complete novice, using an entry-level camera right out of the…