State Dept. officials resign following Benghazi report

Eric Boswell, the head of diplomatic security at the State Department, has resigned, CBS News confirmed, following the release of a harsh report detailing State Department missteps that led to the attack on the U.S. Consulate in Benghazi.

Two other officials are resigning as well, CBS News has confirmed: Charlene Lamb, the deputy assistant secretary responsible for embassy security, and an unnamed person from the State Department's near eastern affairs department.

Boswell's resignation from his post as assistant secretary of state for diplomatic security is effective immediately. Sources say he will stay on as director of the Office of Foreign Missions for a short, indefinite time.

The report, released today by an independent board led by retired Ambassador Thomas Pickering and former Joint Chiefs of Staff Chairman Adm. Mike Mullen, did not single out any individuals for culpability. It did, however, blame failures within two bureaus at the State Department for the missteps that eventually lead to the deaths of Ambassador Christopher Stevens and three additional American personnel in Libya. The two bureaus cited -- Near Eastern Affairs and Diplomatic Security -- were criticized for a security posture that was "grossly inadequate to deal with the attack," and for failing to coordinate with other agencies to better secure the consulate.

Members of the House Foreign Affairs and Senate Foreign Relations Committees were briefed on the report this morning. After the briefings, a number of congressmen said Secretary of State Hillary Clinton should still testify before Congress on the Benghazi attack.

Clinton was scheduled to testify on the Benghazi attack this Thursday in two congressional hearings. However, after falling ill and suffering from a concussion, she's no longer scheduled to appear at the hearings. Clinton sent a letter to Congress, indicating she accepts the Benghazi report's 29 recommendations for strengthening security at diplomatic posts and recognizes the the need to address the "systemic challenges" at the State Department.

House Foreign Affairs Chairwoman Ileana Ros-lehtinen, R-Fla., said Clinton "absolutely" still needs to testify. Rep. Jeff Duncan, R-S.C., said committee members still have many questions and that today's closed-door briefing was just the start.

Sen. Bob Corker, R-Tenn., said it was "imperative" for Clinton to testify before a new secretary of state is confirmed in President Obama's second term.

"I think that is very important to her, I think it is very important for our country, and I think it is very important to really understand the inner workings of the State Department itself," he said.

House Oversight and Government Reform Committee Chairman Darrell Issa, R-Calif., said in a statement that Clinton will need to "personally address" issues he feels were not addressed entirely in the report.

"While I appreciate the board's hard work, I am deeply concerned that the unclassified report omits important information the public has a right to know," Issa said. "This includes details about the perpetrators of the attack in Libya as well as the less-than-noble reasons contributing to State Department decisions to deny security resources. Relevant details that would not harm national security have been withheld and the classified report suffers from an enormous over-classification problem."

Sen. Dick Durbin, D-Ill., by contrast, called the report's conclusions "very stark, very candid, very honest."

The report, he said, "told us the following: Mistakes were made, lives were lost, lessons need to be learned." Durbin said the review board's conclusions were: "Our intelligence fell short, our security personnel were inexperienced and unprepared, our security systems failed, our host nation was lacking in protection for our own people, and senior State Department officials unfortunately showed a lack of leadership and management ability."

He added, "That is a challenge to all of us, it is a challenge for us to assess this in an honest fashion and to change policy to put resources in place that will make a difference."

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Inside One School's Extraordinary Security Measures

While schools across America reassess their security measures in the wake of the tragic shooting at Sandy Hook Elementary School in Newtown, Conn., one school outside of Chicago takes safety to a whole new level.

The security measures at Middleton Elementary School start the moment you set foot on campus, with a camera-equipped doorbell. When you ring the doorbell, school employees inside are immediately able to see you, both through a window and on a security camera.

“They can assess your demeanor,” Kate Donegan, the superintendent of Skokie School District 73 ½, said in an interview with ABC News.

Once the employees let you through the first set of doors, you are only able to go as far as a vestibule. There you hand over your ID so the school can run a quick background check using a visitor management system devised by Raptor Technologies. According to the company’s CEO, Jim Vesterman, only 8,000 schools in the country are using that system, while more than 100,000 continue to use the old-fashioned pen-and-paper system, which do not do as much to drive away unwanted intruders.

“Each element that you add is a deterrent,” Vesterman said.

In the wake of the Newtown shooting, Vesterman told ABC News his company has been “flooded” with calls to put in place the new system. Back at Middleton, if you pass the background check, you are given a new photo ID — attached to a bright orange lanyard — to wear the entire time you are inside the school. Even parents who come to the school on a daily basis still have to wear the lanyard.

“The rules apply to everyone,” Donegan said.

The security measures don’t end there. Once you don your lanyard and pass through a second set of locked doors, you enter the school’s main hallway, while security cameras continue to feed live video back into the front office.

It all comes at a cost. Donegan’s school district — with the help of security consultant Paul Timm of RETA Security — has spent more than $175,000 on the system in the last two years. For a district of only three schools and 1100 students, that is a lot of money, but it is all worth it, she said.

“I don’t know that there’s too big a pricetag to put on kids being as safe as they can be,” Donegan said.

“So often we hear we can’t afford it, but what we can’t afford is another terrible incident,” Timm said.

Classroom doors open inward — not outward — and lock from the inside, providing teachers and students security if an intruder is in the hallway. Some employees carry digital two-way radios, enabling them to communicate at all times with the push of a button. Administrators such as Donegan are able to watch the school’s security video on their mobile devices. Barricades line the edge of the school’s parking lot, keeping cars from pulling up close to the entrance.

Teachers say all the security makes them feel safe inside the school.

“I think the most important thing is just keeping the kids safe,” fourth-grade teacher Dara Sacher said.

Parents like Charlene Abraham, whose son Matthew attends Middleton, say they feel better about dropping off their kids knowing the school has such substantial security measures in place.

“We’re sending our kids to school to learn, not to worry about whether they’re going to come home or not,” she said.

In the wake of the horrific shooting at Sandy Hook last Friday, Donegan’s district is now even looking into installing bullet-resistant glass for the school building. While Middleton’s security measures continue to put administrators, teachers, parents and students at ease, Sacher said she thinks that more extreme measures — such as arming teachers, an idea pushed by Oregon state Rep. Dennis Richardson — are a step too far.

“I wouldn’t feel comfortable being armed,” Sacher said. “Even if you trained people, I think it’d be better to keep the guns out of school rather than arm teachers.”

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Egypt opposition protests against constitution

CAIRO (Reuters) - Opponents of Egyptian President Mohamed Mursi staged protests in Cairo on Tuesday against an Islamist-backed draft constitution that has divided Egypt but looks set to be approved in the second half of a referendum this weekend.

Several hundred protesters outside the presidential palace chanted "Revolution, revolution, for the sake of the constitution" and called on Mursi to "Leave, leave, you coward!". While the protest was noisy, numbers were down on previous demonstrations.

Mursi obtained a 57 percent "yes" vote for the constitution in the first part of the referendum last weekend, state media said, less than he had hoped for.

The opposition, which says the law is too Islamist, will be encouraged by the result but is unlikely to win the second part this Saturday, which is to be held in districts seen as even more sympathetic towards Mursi's Muslim Brotherhood.

The National Salvation Front opposition coalition said there were widespread voting violations last Saturday and called for protests to "bring down the invalid draft constitution".

The Ministry of Justice said it was appointing judges to investigate complaints of voting irregularities.

Opposition marchers converged on Tahrir Square, cradle of the revolution that toppled Hosni Mubarak almost two years ago, and Mursi's presidential palace, still ringed with tanks after earlier protests.

A protester at the presidential palace, Mohamed Adel, 30, said: "I have been camping here for weeks and will continue to do so until the constitution that divided the nation, and for which people died, gets scrapped."

The build up to the first day of voting saw clashes between supporters and opponents of Mursi in which eight people died. Recent demonstrations in Cairo have been more peaceful, although rival factions clashed on Friday in Alexandria, Egypt's second biggest city.

RESIGNATION

Egypt's public prosecutor resigned under pressure from his opponents in the judiciary, dealing a blow to Mursi and drawing an angry response from his supporters in the Muslim Brotherhood.

In a statement on its Facebook page, the Islamist group that propelled Mursi to power in an election in June, said the enforced departure of public prosecutor Talaat Ibrahim was a "crime" and authorities should not accept the resignation.

Further signs of opposition to Mursi emerged when a judges' club urged its members not to supervise Saturday's vote. But the call is not binding and balloting is expected to go ahead.

If the constitution is passed, national elections can take place early next year, something many hope will help end the turmoil that has gripped Egypt since the fall of Mubarak.

The closeness of the first referendum vote and low turnout give Mursi scant comfort as he seeks to assemble support for difficult economic reforms.

"This percentage ... will strengthen the hand of the National Salvation Front and the leaders of this Front have declared they are going to continue this fight to discredit the constitution," said Mustapha Kamal Al-Sayyid, a professor of political science at Cairo University.

Mursi is likely to become more unpopular with the introduction of planned austerity measures, Sayyid told Reuters.

To tackle the budget deficit, the government needs to raise taxes and cut fuel subsidies. Uncertainty surrounding economic reform plans has already forced the postponement of a $4.8 billion loan from the International Monetary Fund. The Egyptian pound has fallen to eight-year lows against the dollar.

Mursi and his backers say the constitution is needed to move Egypt's democratic transition forward. Opponents say the document is too Islamist and ignores the rights of women and of minorities, including Christians who make up 10 percent of the population.

Demonstrations erupted when Mursi awarded himself extra powers on November 22 and then fast-tracked the constitution through an assembly dominated by his Islamist allies and boycotted by many liberals.

The referendum has had to be held over two days because many of the judges needed to oversee polling staged a boycott in protest. In order to pass, the constitution must be approved by more than 50 percent of those voting.

(Additional reporting by Tamim Elyan and Edmund Blair; Writing by Giles Elgood; Editing by Alison Williams)

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Obama backs bill to ban assault weapons: White House

WASHINGTON: President Brack Obama on Tuesday threw his weight behind a bill to reintroduce a ban on civilians owning assault weapons, in the wake of a gun massacre in an elementary school that shocked the nation.

White House spokesman Jay Carney said the president would support a law proposed by Democratic Senator Dianne Feinstein to prohibit the arms, defined as certain types of semi-automatic firearm with removable magazines.

- AFP/fa

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Apple releases iOS 6.0.2 to fix Wi-Fi issue

Apple today released another minor update to
iOS 6 that promises to fix a Wi-Fi issue affecting its newest devices.

The software, which went out this morning to the
iPhone 5 and
iPad Mini, says simply that it "fixes a bug that could impact Wi-Fi." No additional features or security fixes are part of the update, according to the company's release notes.

The update comes just a day after Apple gave developers a fourth beta of iOS 6.1. That software, which is expected by the end of the year, or shortly thereafter, brings new boarding pass behavior in Apple's Passbook software, tweaks to Safari, reworked music playback controls from the lock screen, ticket purchases through Fandango in Siri, and a back-end change in Apple's mapping software.

Apple did not include specifics on which Wi-Fi issue the update addressed. Users have complained about a number of things, from poor reception to dropped connections.

To install the update it appears that users must currently go through Apple's iTunes software. Users report, and CNET has confirmed, that attempting to receive the update through iOS' built-in updating tool results in an error message that says the device is unable to check for any updates.

Apple's last update to iOS 6 was iOS 6.0.1 on November 1. That software fixed a handful of bugs, including one that kept iPhone 5 users from installing over-the-air software updates. It also fixed an issue with lines appearing on the software keyboard, and a bug that deleted meetings from calendars when accepting an invitation.

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First of 8 funerals at Newtown church begins

NEWTOWN, Conn. Family members have gathered for the first of eight funerals for school shooting victims to be held at a Catholic church in Newtown, Conn.

A motorcade of dozens of vehicles led by police motorcycles accompanied the family of 6-year-old James Mattioli to St. Rose of Lima on Tuesday. His funeral comes a day after two other 6-year-old boys were laid in the first of a long, almost unbearable procession of funerals.

32 Photos

Victims of Conn. school shooting

At least one other funeral was planned - for 6-year-old Jessica Rekos - as well as several wakes, including one for teacher Victoria Soto, who has been praised as a hero for sacrificing herself to save several students in one of the worst mass shootings in U.S. history.

Margarita Rosniak and her 10-year-old daughter, Charlotte, watched from the sidewalk as people entered the church for Mattioli's funeral. They had traveled from California for a Christmas vacation in New York and came to Newtown to join the residents in their grief.

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Holiday week is full of funerals for Newtown, Conn.

Clutching her daughter close, Margarita Rosniak spoke of sympathizing with the parents. Her daughter says she plans to do a school project on the massacre. She asks, "What was the point of it? They're just little kids."

Gunman Adam Lanza shot his mother Friday, then headed to Sandy Hook Elementary where he killed 20 children and six adults, and himself.

Security remained high, and the small, affluent Connecticut community was still on edge as the rest of the country prepared for the Christmas holidays.

"There's going to be no joy in school," said 17-year-old P.J. Hickey. "It really doesn't feel like Christmas anymore." But he added, "This is where I feel the most at home. I feel safer here than anywhere else in the world."

In the middle of town, an ever-growing memorial has become a pilgrimage site for strangers who want to pay their respect.

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Funerals begin for Conn. shooting victims

One man told CBS Station WCBS why he visited: "Because I'm a dad with four beautiful daughters, when I found out it broke my heart. It's hard to sleep, I don't know how to feel."

In a sign of investors distancing themselves from gun makers, private equity firm Cerberus Capital Management announced it would sell its stake in major arms manufacturer Freedom Group. It said in a statement, "It is apparent that the Sandy Hook tragedy was a watershed event that has raised the national debate on gun control to an unprecedented level."

The mystery of why a smart but severely withdrawn 20-year-old, Adam Lanza, shot his mother to death in bed before rampaging through Sandy Hook Elementary, killing 20 children ages 6 and 7, was as deep as ever.

Sandy Hook Elementary will remain closed indefinitely.

Investigators say Lanza had no ties to the school he attacked, and they have found no letters or diaries that could explain why he targeted it. He forced into the school shortly after its front door locked as part of a new security measure. He wore all black and is believed to have used a Bushmaster AR-15-style rifle, a civilian version of the military's M-16. Versions of the AR-15 were outlawed in the U.S. under the 1994 assault weapons ban, but the law expired in 2004.

Debora Seifert, a spokeswoman for the federal Bureau of Alcohol, Tobacco, Firearms and Explosives, said both Lanza and his mother fired at shooting ranges and visited ranges together.

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Political reaction to Newtown, CT tragedy

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Gun sales on the rise after Conn. shooting

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CBS News poll: Strong support for tougher gun laws

At the White House on Monday, spokesman Jay Carney said curbing gun violence is a complex problem that will require a "comprehensive solution." He did not mention specific proposals to follow up on President Barack Obama's call for "meaningful action."

New York City's billionaire Mayor Michael Bloomberg, perhaps the most outspoken advocate for gun control in U.S. politics, again pressed Obama and Congress to toughen gun laws and tighten enforcement.

"If this doesn't do it," he asked, "what is going to?"

At least one senator, Virginia Democrat Mark Warner, said Monday that the attack has led him to rethink his opposition to the ban on assault weapons. And West Virginia Sen. Joe Manchin, a Democrat who is an avid hunter and lifelong member of the powerful National Rifle Association, said it's time to move beyond the political rhetoric and begin an honest discussion about reasonable restrictions on guns.

In Newtown on Monday, minds were on mourning.

Two funeral homes filled for Jack Pinto and the youngest victim, Noah Pozner, who turned 6 just two weeks ago..

A rabbi presided at Noah's service, and in keeping with Jewish tradition, the boy was laid to rest in a simple brown wooden casket with a Star of David on it.

"I will miss your perpetual smile, the twinkle in your dark blue eyes, framed by eyelashes that would be the envy of any lady in this room," Noah's mother, Veronique Pozner, said at the service, according to remarks the family provided to The Associated Press. Both services were closed to the news media.

Noah's twin, Arielle, who was assigned to a different classroom, survived the killing frenzy.

At 6-year-old Jack Pinto's Christian service, hymns rang out from inside the funeral home, where the boy lay in an open casket.

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Threat Closes Newtown Elementary School

Local officials closed a Newtown, Conn., elementary school following a threat on what would have been the first day of classes since a shooting rampage at nearby Sandy Hook Elementary School.

Classes at Head O'Meadow Elementary School were scheduled to begin at 11 a.m. ET, but as parents and students arrived at the school they encountered police who turned them away.

Principal Barbara Gasparine sent an email to parents telling them that school would be closed rather than locked down due to the threats, the nature of which was not specified.

CLICK HERE FOR A TRIBUTE TO THE SHOOTING VICTIMS

"As was predicted by the police that there would be some threats, the police were prepared and have us in lockdown, which is our normal procedure. Due to the situation, students will not come to school today. Please make arrangements to keep them home," Gasparine wrote parents in an email obtained by ABC News.

Newtown police would not specify the type of threat, calling the school closure a "precautionary measure" in the wake of last week's shooting that left 20 children and six adults of Sandy Hook dead.

Sandy Hook Elementary School Shooting: Victims Laid to Rest Watch Video

Gun Control Debate Resurfaces After Sandy Hook Shooting Watch Video

Sandy Hook Shooting: What Was Wrong with Adam Lanza? Watch Video

Reporters at the school to cover the arrival of Newtown students on the first day since the massacre were pushed back by police a quarter of mile away from the school.

Sandy Hook Elementary and Head O'Meadow are 4.5 miles away from each other, and in the same district.

Sandy Hook is classified an active crime scene and will remain closed "indefinitely," according to authorities.

Officials are moving furniture and supplies from Sandy Hook classrooms to a former middle school in nearby Monroe, Conn. A start date for those students has yet to be determined.

It was a somber day for many parents who sent their students back to school. Green and white ribbons adorned the grilles of Newtown school buses this morning.

There was a heavy police presence atthe schools-- 15 police departments had been called in to help with security and there were several units at each school, an officer said.

At Hawley Elementary, families walked their children to school. One tearful mother told ABC that the time is right to go back to school for her fourth grader. Another father told us that this is "a day of great sadness" but that "it will be good to get back into a routine." He addressed concerns of a premature return, saying that "There's no rulebook for this...is there ever a right day?"

At Newtown Middle School, lines of parents waited to drop off their kids. One teacher hugged a student as he exited the car. Children in school buses waved at reporters as they drove by.

And at Reed Intermediate, a memorial has been set up in the center island. Encircling the flag pole are three wreaths, bouquets of flowers, a host of green and white balloons, and what appears to be notes.

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Syrian vice president says neither side can win war

BEIRUT (Reuters) - Syrian Vice President Farouq al-Sharaa said that neither the forces of President Bashar al-Assad nor rebels seeking to overthrow him can win the war which is now being fought on the outskirts of Assad's powerbase in Damascus.

Sharaa, a Sunni Muslim in a power structure dominated by Assad's Alawite minority, has rarely been seen since the Syrian revolt erupted in March 2011 and is not part of the president's inner circle directing the fight against Sunni rebels.

But he is the most prominent figure to say in public that Assad will not win. He was speaking to Lebanon's al-Akhbar paper in an interview from Damascus, which is now hemmed in by rebel fighters to the south.

Assad's forces have used jets and artillery to try to dislodge the fighters from around Damascus but the violence has crept into the heart of the capital and activists said rebels overran three army stations in a new offensive in the central province of Hama on Monday.

Sharaa said the situation in Syria, where more than 40,000 people have been killed, was deteriorating and a "historic settlement" was needed to end the conflict, involving regional powers and the U.N. Security Council and the formation of a national unity government "with broad powers".

"With every passing day the political and military solutions are becoming more distant. We should be in a position defending the existence of Syria. We are not in a battle for an individual or a regime," Sharaa was quoted as saying.

"The opposition cannot decisively settle the battle and what the security forces and army units are doing will not achieve a decisive settlement," he told the paper, adding that the insurgents fighting to topple Syria's leadership could plunge it into "anarchy and an unending spiral of violence".

Sources close to the Syrian government say Sharaa had pushed for dialogue with the opposition and objected to the military response to an uprising that began peacefully.

In Damascus, clashes raged between Palestinian factions loyal to and opposed to Assad in the Yarmouk district a day after Syrian fighter jets bombed a mosque there, killing at least 25 people.

Activists said troops and tanks were gathered outside the camp on Monday and hundreds of Palestinians refugees living in Syria flooded into Lebanon.

Syria hosts half a million Palestinian refugees, most living in Yarmouk and descendants of those admitted after the creation of Israel in 1948, and has always cast itself as a champion of the Palestinian struggle, sponsoring several guerrilla factions.

Both Assad's government and the mainly Sunni Muslim Syrian rebels have enlisted and armed divided Palestinian factions as the uprising has developed into a civil war.

In a veiled criticism of the crackdown, Sharaa said there was a difference between the state's duty to provide security to its citizens, and "pursuing a security solution to the crisis".

He said even Assad could not be certain where events in Syria were leading, but that anyone who met him would hear that "this is a long struggle...and he does not hide his desire to settle matters militarily to reach a final solution."

CHANGE INEVITABLE

"We realize today that change is inevitable," Sharaa said, but "none of the peaceful or armed opposition groups with their known foreign links can call themselves the sole legitimate representative of the Syrian people".

"Likewise the current leadership...cannot achieve change alone after two years of crisis without new partners who contribute to preserving (Syria's) national fabric, territorial unity and regional sovereignty".

Rebels have now brought the war to the capital, without yet delivering a fatal blow to the government. But nor has Assad found the military muscle to oust his opponents from the city.

In Hama province, rebels and the army clashed in a new campaign launched on Sunday by rebels to block off the country's north, activists said.

The Syrian Observatory for Human Rights, an opposition-linked violence monitor, said fighting raged through the provincial towns of Karnaz, Kafar Weeta, Halfayeh and Mahardeh.

"There is not fighting in these areas often," said Rami Abdelrahman, head of the Observatory, adding that rebels units from Idlib joined the offensive and three army stations had been destroyed.

He said there were no clashes reported in Hama city, which lies on the main north-south highway connecting the capital with Aleppo, Syria's second city.

Qassem Saadeddine, a member of the newly established rebel military command, told Reuters on Sunday fighters had been ordered to surround and attack army positions across the province. He said forces loyal to Assad had been given 48 hours to surrender or be killed.

"When we liberate the countryside of Hama province ... then we will have the area between Aleppo and Hama liberated and open for us," he said.

In 1982 Hafez al-Assad, father of the current ruler, crushed an uprising in Hama city, killing up to 30,000 civilians.

Qatiba al-Naasan, a rebel from Hama, said the offensive would bring retaliatory air strikes from the government but that the situation is "already getting miserable".

"For sure there will be slaughter - if the army wants to shell us many people will die. There are many populated areas and many refugees have fled here."

"(But) we felt it was always inevitable Hama would be shelled and we at least want to be fighting to liberate it," he said from Hama through Skype.

He said rebels would attack areas of strategic significance but not maintain a presence in other areas to allow civilians a safe place to flee.

(Additional reporting by Oliver Holmes and Erika Solomon in Beirut, Noah Browning and Ali Sawafta in Ramallah, and Nidal al-Mughrabi in Gaza; editing by Philippa Fletcher)

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EU urges quick trade talks after Japan vote

BRUSSELS: European Union president Herman Van Rompuy and European Commission Jose Manuel Barroso on Monday congratulated Japan's Shinzo Abe for his sweeping election win while urging the swift opening of trade talks.

"On behalf of the European Union please accept our congratulations on your success on the occasion of the recent parliamentary elections," the two said.

"We look forward to further strengthening relations between Japan and the European Union, in particular to the opening of negotiations on a deep and comprehensive Free Trade Agreement," they added in a statement.

"Above all, we wish to affirm our continued friendship and solidarity with the people and government of Japan.

EU trade ministers last month agreed to the launch of negotiations on a massive free trade deal between the two economies.

Once concluded, EU officials say such a mega-size deal could increase the bloc's gross domestic product by almost one percentage point, boost EU exports to Japan by one third, and add 420,000 extra jobs across the continent.

- AFP/fa

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DxO Labs tries making sense of camera lens sharpness

This chart shows the perceptive megapixel score for the Canon EF 70-200mm f/2.8L IS II USM mounted on the 21-megapixel Canon EOS 5D Mark II. At settings where the plot is green, the lens matches the camera's resolution. At f22 and smaller apertures, the lens-camera combination reduces the camera's effective performance to only about 4 megapixels or so.

(Credit:
screenshot by Stephen Shankland/CNET)

Aiming to make it easier for photography enthusiasts to evaluate photo gear, DxO Labs today announced a new method of measuring lens sharpness it hopes will make more intuitive sense.

The idea, called the perceptual megapixel, shows how much of a camera's original sensor resolution a particular lens can preserve when factors such as lens sharpness, optical defects, and sensor pixel size are taken into account.

One example the company provides: on a 21.1-megapixel Canon 5D Mark II, the Sigma 35mm F1.4 DG lens gets a score of 17.2 perceptual megapixels and the much higher-priced Carl Zeiss Distagon T* HSM 35mm f/1.4 ZE gets only 15.2 perceptual megapixels.

The perceptual megapixel score is designed to be more practical than the time-tested but often incomprehensible measurement that prevails today, MTF (modulation transfer function) graphs. And the perceptual megapixel measurement also takes into account the camera, not just the lens.

That means, for example, that a person in the market for new photo gear could make a more informed judgement about both cameras and lenses. For example, is it worth paying a price premium for a lens on the expectation of a later upgrade to a full-frame camera body?

DxO Labs today moved to the new measurement on its DxOMark site, where it publishes test results for image sensors and lens performance scores for 2,700 combinations of lenses with particular cameras.

One example of the performance of two 35mm f1.4 lenses on the Canon 5D Mark II. The perceptive megapixel rating shows the Zeiss lens scoring lower than the Sigma lens on that particular camera.

(Credit:
DxO Labs)

One example: The Canon EF-S 55-250mm f/4-5.6 IS II mounted on an 18-megapixel Canon EOS 7D yields only about 5 perceptive megapixels of resolution shooting wide open anywhere from 55mm to 250mm and only hitting about 6 perceptive megapixels at the maximum tops.

But the Canon EF 70-200mm f/2.8L IS II USM on a 21.1-megapixel Canon EOS 5D Mark II, measures better than 20 megapixels all across its zoom range and from f2.8 to f5.6.

Of course, many other factors weigh into lens quality assessments besides sharpness, including ruggedness, vignetting, distortion, weather-sealing, image stabilization, and lens coatings that reduce lens flare and other optical drawbacks.

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