ISO, Aperture and Shutter Speed Explained

When you think of the craft or art of photography, you must immediately think of exposure. Exposure is a critical element that determines what is actually recorded on film or the image sensor. There are three adjustable elements that control the exposure – ISO, Aperture and Shutter Speed.

What controls exposure?

ISO ratings determine the image sensor’s sensitivity to light, each value of the rating represents a “stop” of light, and each incremental ISO number (up or down) represents a doubling or halving of the sensor’s sensitivity to light.

The Aperture controls the lens’ diaphragm, which controls the amount of light traveling through the lens to the film plane. The aperture setting is indicated by the f-number, whereas each f-number represents a “stop” of light.

The Shutter Speed indicates the speed in which the curtain opens then closes, and each shutter speed value also represents a “stop” of light. The shutter speed is measured in fractions of a second.

MacArthur “Genius” Grants

Michael Zhang . Oct 02, 2012

Every year, the MacArthur Foundation selects 20-40 exceptional people in the United States and awards them with $500,000 MacArthur Fellowship “Genius Grants” — prestigious awards that come with no strings attached. Winners are of all ages, come from all kinds of fields, and are selected purely because they “show exceptional merit and promise for continued and enhanced creative work.”

The 2012 winners were revealed today, and of the 23 people selected, two of them were photographers: Uta Barth and An-My Lê.

Chinese hack attack on White House computer

Washington confirms Chinese hack attack on White House computer

By , Published October 01, 2012,

White House sources partly confirmed an alarming report that U.S. government computers — reportedly including systems used by the military for nuclear commands — were breached by Chinese hackers.

“This was a spear phishing attack against an unclassified network,” a White House official told “These types of attacks are not infrequent and we have mitigation measures in place.”

A law enforcement official who works with members of the White House Military Office confirmed the Chinese attack to on Monday, but it remains unclear what information, if any, was taken or left behind.

“This [White House Communications Agency] guy opened an email he wasn’t supposed to open,” the source said.

That email contained a spear phishing attack from a computer server in China, the law enforcement source told The attack was first reported by the conservative blog Free Beacon. Spear phishing involves the use of messages disguised to appear as valid; in fact, they contain targeted, malicious attempts to access sensitive or confidential information.

By opening the email, which likely contained a link to a malicious site or some form of attachment, the agency member allowed the Chinese hacker to access a system, explained Anup Ghosh, founder and CEO of security company Invincea.

Read more:




Kenya attracts most new foreign projects, but political risk rises

Kenya attracts most new foreign projects, but political risk rises  – Business |

Kenya’s standing as East Africa’s most attractive destination for foreign investment is under serious threat from neighbouring states, who are cashing in on the country’s lengthy licensing procedures and sluggish commercial dispute settlement to sharpen their competitiveness.


Posted  Saturday, September 22  2012 at  12:09


  • The Foreign Direct Investments (FDI) 2012 report published by FDI Intelligence, a specialist research agency of the Financial Times, shows that Kenya recorded a 77 per cent increase in the number of FDI projects last year, from 31 projects in 2010. It received 55 projects in 2011.
  • The rise in the number of new FDI projects comes at a time when Kenya has stepped up its search for international investors through eight investment summits to be held in the world’s major financial capitals over the next 12 months.
  • However, political risks and slow business reforms continue to taint the investment outlook. Delays in setting up crucial governing bodies under the Constitution enacted in 2010 are dampening investor confidence in the country.
  • Data from the World Bank shows that over the past three decades, Kenya has had its lowest growth periods in or just following election years, with GDP growth slumping one percentage point on average below the long-term trend.
  • Kenya’s vibrant private sector, advanced infrastructure and skills base have been its main selling points in the global investment market. But red tape, corruption, fears of political instability and a restrictive labour market remain key drawbacks.
  • According to the Financial Times FDI report, coal, oil and natural gas were the leading sectors that attracted the interest of foreign investors in East Africa.

23 Great Examples of Illustrated Elements in Web Design

Illustrated Elements in Web Design | Inspiration.

Illustrated elements are great way to give a website a unique look. Whether its an illustrated background, a stylish sketched font, or hand drawn icons, using illustrated elements can give a design tons of personality. For this post, we’ve gathered 23 examples of illustrated elements in web design to inspire you for your next project.

, Smashing Magazine, October 1 2012

The History of Programming Languages [Infographic]

Rackspace recently published a nice infographic on the evolution of programming languages. It starts with FORTRAN and COBOL and runs through Ruby on Rails (which, yes, is a framework and not a language).

Unfortunately, it omits such influential languages as LispALGOL 60and Smalltalk. But including every important language ever would make for a pretty long infographic.

    – · JULY 27TH, 2011


Wanda |

Wanda |

Wanda never imagined she’s be homeless at 59. Her husband has serious health issues, so she quit her job to relocate with her husband to St Louis. Wanda was not able to find a new job so a friend offered her a place to stay in Los Angeles.

After living with her friend for 30 days Wanda came to Ascencia, a homeless shelter in Glendale, California. I work at Ascencia as a outreach case manager. I normally don’t share stories from work, but Huffington Post asked me to interview a few homeless people about the presidential election[], and Wanda was so awesome I kept the camera rolling and could not help but ask about her story.

The 10 Most Anticipated Fall Movies | Movie Talk – Yahoo! Movies

The 10 Most Anticipated Fall Movies

By Jonathan Crow | Movie Talk – Fri, Aug 31, 2012 5:05 PM EDT

Though the summer movie season winds up this weekend and the holiday movie season doesn’t really ramp up until Thanksgiving, there are still going to be some pretty great flicks coming out this fall, from a time-travel thriller to a high-profile presidential bio-pic to the return of everyone’s favorite British spy. Check out 10 of the fall’s most anticipated movies below:

The Master (9/21) — There’s been a lot of talk about whether or not Paul Thomas Anderson’s latest movie is a thinly veiled tale about the origins of Scientology.  The filmmakers are remaining mum. What we do know is that “The Master” is about a washed up ex-sailor (played by Joaquin Phoenix) who falls into the orbit of Lancaster Dodd (Phillip Seymour Hoffman), a charismatic huckster who founded a Scientology-like religious organization.  It’s been five years since Paul Thomas Anderson’s last movie, the flinty masterpiece “There Will Be Blood,” so expectations for this movie are very high.

via The 10 Most Anticipated Fall Movies | Movie Talk – Yahoo! Movies.

Kampala! Dare to dream!

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