Thursday, 12 August 2010

How-To: Photograph the Perseid Meteor Shower and more

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How-to: Photographing the Perseid Meteor Shower
Head for the country and point your camera toward the sky.


 

Test: Ricoh GXR With A12 and S10 Camera Units
Meet the camera with interchangeable...cameras.

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Nikon users get the first chance at Tamron's new super-tele-zoom.

OKCupid's Disturbing Photo Survey
The results are amusing, if a little troubling.



 

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Tech Support

Question:
Back in the old days of cameras without autoexposure, most every photographer knew the "sunny 16" rule: The proper exposure in bright sunlight was the reciprocal of the ISO film speed at f/16. So, if you have your digital camera set to ISO 100, the proper exposure under a cloudless sun should be 1/100 sec at f/16. But my digital camera, a Nikon D40x, never even comes close to that. My photos are correctly exposed, but not what sunny f/16 would call for. Can you explain this?
From: Hugh Cornell
Guilford, England

Answer:
There is often a discrepency between metered exposure and "correct" exposure. A classic example is a white sandy beach on a hazy bright day: While the camera meter might indicate an ISO 100 exposure of around 1/500 sec at f/16, the exposure taht would maintain the bright tonality of the scene would be more like 1/100 at f/16. and cameras now have "smart" meters (like Nikon) that evaluate the exposure on the basis of multiple tones in the image and even colors in the scene. Try this: Set your D40x to spotmeter and in sunlight, meter an evenly colored midtone, preferably a photo grey card. We're betting you'll get close to a sunny f/16 reading.

Got a question? E-mail us at PopPhoto@bonniercorp.com. Also, visit the Tech Support forum at forums.popphoto.com.


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