Tag Archives: how to

How to use your histogram as a digital light meter

A few years ago I had the pleasure to record a title for Dean Collins Software Cinema on Photoshop CS4.  While  much of that information is getting a bit long in the tooth, Softare Cinema has been kind enough to post some of the more relavant training videos on You Tube.  Below is some fine instruction (if I do say so myself) on understanding what a histogram is, and how to use it as a digital light meter.

How to Photograph Star Trails with a Digital SLR (+ Video!)

A time exposure at Mauna Loa Observatory, lasting a little over an hour, produced star trails as Earth rotated. (Jonathan Kingston/Aurora Select for the New York Times)

 

What are Star Trails?

Simply stated, star trails are the streaks in a photograph left by stars during a time exposure as the Earth rotates.  Objects in the foreground of the photograph remain sharp as they are not moving relative to the camera, while the stars, depending on which cardinal direction the camera is facing, will form concentric circles or streaks in the sky.

Why does Photographing Star Trails require a different technique with a Digital SLR? Continue reading How to Photograph Star Trails with a Digital SLR (+ Video!)