Friday, 12 November 2010

Sample Gallery: Nikon 85mm f/1.4 lens and more!

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November 12, 2010

Breaking news from America's top photo magazines

From the Forums: What’s the best technique for capturing great photos of the moon?
Our readers share their thoughts. Join and Contribute!

Popular Photography American Photo

Sample Gallery: Nikon 85mm f/1.4G
One of Nikon’s most versatile and solid-built primes.


Gallery: Shooting America's Endangered Trees
American Photo sent 12 photographers to capture some of America's most significant trees.



Introducing the Pop Photo Buying Guide
New! Our database of every DSLR and lens worth your attention.



Time Exposure: November 1950
Popular Photography takes a trip down memory lane.



Photo of the Day

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TECH SUPPORT

Yesterday’s papers

Q. I have some Ilford Multigrade Pearl enlarging paper that I had used when making b&w prints in a darkroom. In theory, could this paper be used to make prints in an inkjet printer? (The paper has been stored light-tight but is over 10 years old.)

A. There are numerous reasons why this would be unworkable, but let’s give the biggest one: Darkroom paper is not designed to absorb inkjet ink, so you would be lucky to get an image at all. Undeveloped photo paper stock is also unstable—you’d need to fix it, and wash it, and dry it, or it would darken over time once exposed to light.



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Thursday, 4 November 2010

Introducing the PopPhoto Buying Guide, the Panasonic Lumix Gf2 and much more!

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November 4, 2010

Breaking news from America's top photo magazines

From the Forums: What methods do you use to ensure your images are properly backed up?
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Popular Photography American Photo

Introducing the PopPhoto Buying Guide
New! Our database of every DSLR and lens worth your attention right now.


How To: Pick the Right Camera Body
Find out what factors you should consider when purchasing a new body.



How To: Pick the Right Lens
Get the right glass for your shooting style and your budget.



New Gear: Panasonic Lumix DMC-GF2 Is Tiny, Touch-Friendly
Panasonic's smallest Micro Four Thirds camera boasts a 3-inch touchscreen.



Photo of the Day

Think your photos have what it takes to be named Photo of the Day? Then upload your best shots to our Flickr page.

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Understanding Noise

Say you're tuning a radio to a station with a weak signal. You turn up the volume and hear static. Why? By amplifying the signal, you're also amplifying unwanted stray electronic bits: audio noise.?

Electronic noise in digital photos has the same cause: Amplify a weak signal from an imaging sensor too much, and you also amplify stray electrons in the sensor or elsewhere in the circuitry. It shows up in your pictures as coarse grain or color mottling.

A digital sensor is basically an array of tiny light meters, called pixels. Each pixel reads the light level at its spot on the sensor, and this measurement is bundled with those from the other pixels to make a picture file. But if the tiny meters get too little light, the signal they send will be too weak unless—yep—you amplify the signal. And by doing that, you turn up the volume on the noise.


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