Originally posted on Click Cristão:

As lentes ou objetivas são os olhos da câmera. Por isso devemos entender seu funcionamento com precisão para usarmos cada tipo de lente para a situação correta. Quando falamos em lente, podemos cair no erro de acharmos que trata-se de um tubo plástico ou metálico com uma vidro especial lá dentro. Mas na verdade, o que chamamos de  lente é um conjunto de lentes. Um pacote composto por diversos elementos ópticos em arranjos muito precisos. Os materiais utilizados na fabricação dos “vidros” são muito delicados e de pureza altíssima.

Distância focal

É uma especificação que toda lente tem. É uma medida bem técnica, entre um ponto específicos dentro da lente e o sensor da câmera. Pra que gosta de um tecniquês é: a distância entre o ponto de convergência da luz (ponto nodal) até o ponto onde a imagem é focalizada (o sensor).

A distância focal é medida em milímetros, por…

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Originally posted on Photofocus:

I’ve been spending a lot of time thinking about composition lately.  I am really trying to push myself to get beyond the rule of thirds and try  out some new methods.

The method I’m experimenting with now is called the Golden Spiral.  It’s based on of all things an ancient sequence of numbers that often repeats in nature.

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144

The sequence is often called the Fibonacci numbers and is named after  Leonardo Fibonacci who was an Italian mathematician.  He didn’t actually invent the series (it’s though to have originated from the Hindu–Arabic numeral system.

The sequence is based on adding the adding adjacent numbers in a string, then carrying the results.

0+1=1, 1+1=2, 1+2=3, 2+3=5, 3+5=8, 5+8=13, 8+13=21, 13+21=34 (and so on)

A tiling image with squares whose lengths are successive Fibonacci numbers  By Borb — Wikimedia Commons

A tiling image with squares whose lengths are successive Fibonacci numbers
By Borb — Wikimedia Commons

If you draw  circular arcs…

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Originally posted on Gigaom:

LG is buying HP’s (S HPQ) troubled mobile operating system webOS, according to reports from CNET and the Verge. However, the company doesn’t want to put the system to use in any of its phones: Instead, LG plans to use webOS to power its smart TVs. That could be bad news for Google, (s GOOG) which has been cooperating with LG on getting Google TV into the hands of consumers.

The deal between LG and HP includes the webOS source code, documentation, websites and what’s remaining of the webOS team. Cloud components such as the webOS app store technology as well as all of the patents will remain with HP, but are going to be licensed to LG. There’s no word on the purchase price.

Most of LG’s smart TVs have been powered by the company’s own app platform, which was originally called NetCast and has been ripe for…

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Originally posted on PandoDaily:

Take a number

To say that pundits weren’t happy with Orchestra’s decision to implement a reservation system with the release of Mailbox, the much-talked-about emailing app for the iPhone, would be an understatement. Now Tempo, a smart calendaring app that my colleague Richard Nieva described as “a more focused Google Now,” has announced its plan to instate a similar reservation system.

Tempo announced its intent via a blog post titled “Due to the continued demand, we are instituting a reservation system,” writing:

Friends,

Making your calendar smart takes time – we are continuing to be overwhelmed with the response.

Here is the plan:

We will submit a new version of Tempo Smart Calendar with a reservation system to the App Store tomorrow (Feb 15th) for express approval
Once approved (usually within 24 hours), you can install the new Tempo and secure your position and we will…

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Originally posted on Photofocus:

Photo by Scott Bourne - Attribution-NonCommercial-NoDerivs Creative Commons

Photo by Scott Bourne – Attribution-NonCommercial-NoDerivs Creative Commons

Short and sweet. If you know nothing about car photography beyond what I share here, your car photographs will be satisfying.

1. Always try to shoot at sunrise or sunset.
2. Always have a good clean background and pray for clouds.
3. Use a wide angle lens
4. Always shoot from a low angle
5. Always turn the car’s lights on.

That’s it. You do those five things (all of which are there to be seen in this photo I made of my new Jeep Trailhawk) and you’ll get a great result.

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Skip Cohen University Professional photo education for wedding & portrait photographers. Sign up for SCU THRIVE in Vegas, March 8…

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