Tips for Purchasing a Digital Camera Lens

Your lens is an essential element to good photographs. It's not just your camera. People spend thousands of dollars on a good camera and neglect the lens.

Change that around! Make sure you buy a good camera lens when purchasing a camera. Buy a good camera as well, but don't neglect a good camera lens.

Why? Your camera is just the 'holder' for the photograph. The lens is what your camera sees all your shots through. A good lens is essential to clear and sharp photos.

With most compact digital cameras, you can't change the lens. So in that case, don't just buy a good camera, ensure it also has a good lens.

Avoid a plastic digital camera lens because it doesn't have the clarity of a glass lens.

What model of lens?

Stick with camera lenses from well known manufacturers like Nikon, Canon and Pentax. Ensure you purchase a lens that works with your camera too. A Nikon camera lens usually won't work well with a Canon camera.

There are specialty lens manufacturers like Carl Zeiss, Leica and Leupold. If you're a beginner, don't worry about these lenses until you are more advanced as they come with very high prices and it's hard to justify the price for the small increase in quality.

Types of Camera Lens

The most common lenses are : Wide Angle, Normal and Telephoto. The type of lens is determined by the Focal Length of the lens. See below. A Zoom Lens is simply a lens that can change Focal Length from a Wide Angle to a Telephoto (or somewhere inbetween).

There are a number of things to look for when purchasing a camera lens.

Lens Focal Length

The Focal Length of a lens determines the amount of magnification and angle of vuew the lens can see. The Focal Length is measured in mm. It's the Focal Length that determines if the lens is a:

- Wide Angle; small magnification, wide angle of view. 20mm to 35mm

- Traditional, or Normal; 50mm

- Telephoto; high magnification, narrow angle of view; 105mm to 300mm.

- Zoom; A Zoom lens can change it's focal length to zoom in. A Zoom lens might have a Focal Length of between 50mm and 150mm.

Some lenses are interchangeable between film cameras and digital cameras, but you need to be aware that the effective focal length CHANGES between film and digital. The focal lengths I describe above are for FILM cameras and need to be multiplied by 1.6 to get the effective focal length on a digital camera. So using a film 35mm lens on a digital camera has an effective focal length of 56mm.

What does this mean for you? It means that you won't get as wide angle on a digital camera as you would on a film camera using the same lens. A 35mm lens which gives a medium wide angle on a film camera acts as a traditional lens on a digital camera

This is a complex subject, so I can't go into too much detail here. If you need more help, the best person to speak to would be your local camera store's resident expert.

Lens Speed

The 'speed' of a digital camera lens also defines a lens. The speed is determined in f-stops and is similar to the f-stop aperture setting on your camera. Faster lenses are more expensive and usually heavier.

Focusing Distance

This is the minimum distance from the camera lens that a subject must be to be in focus. Don't worry about getting a camera with a close focusing distance. Concentrate on a telephoto instead.

More Advanced Features

More expensive lenses have more advanced features.

- Vibration Reduction. A feature called 'vibration reduction' keeps images sharper when shooting in low light. They help to counter any vibration in the camera. Try to find a digital camera lens with this feature.

- USM USM stands for Ultrasonic Motor. This feature of Canon lenses gives you a high speed auto focus but the main benefit is the 'motor' is almost silent, so you don't disturb people around you when your camera is focussing.

- Filter Thread. When purchasing a half-decent lens, it should have a filter thread. This is a thread that allows you to screw on a filter (such as a polariser) to help when photographing difficult situations. Even if you don't need filters right now. it's handy to purchase a lens with a thread so you can add a filter later.

You get what you pay for

Generally the more expensive the lens, the better it is. More expensive lenses usually have a higher number of glass elements in the lens, which also makes them heavier.

Final Notes

While it is important to choose good quality camera lens, for beginners it isn't as important as good composition. Don't fall into the trap of thinking you can only take a great picture with an expensive top-of-the-line lens. A badly composed picture won't look great with a great camera lens.

I don't mean to discount the importance of a good quality lens. A good rule is to only add to your lens collection only when you have a specific need for a particular digital camera lens.

Do your research and your homework first, and find the lens that suits both you and your camera.

David Peterson has a great love of photography and has created a series of free tips at http://www.digital-photo-secrets.com/ to help digital photography users everywhere take better photos.

In The News:

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President-elect Barack Obama, second from the left, stands with, from left to right, Vice President-elect Joe Biden, Secretary of State-designate Sen. Hillary Rodham Clinton, D-N.Y., and National Security Adviser-designate Ret. Marine Gen. James Jones, at a news conference to announce his national security team, in Chicago, Monday, Dec. 1, 2008. (AP Photo/Pablo Martinez Monsivais)AP - President-elect Barack Obama picked a national security team headed by former campaign rival Hillary Rodham Clinton and Bush administration holdover Robert Gates on Monday, and said he wants to consult with military commanders before settling on a firm timetable to withdraw U.S. combat troops from Iraq.



U.S. Army soldiers from Alpha Company, 1st Battalion, 5th Infantry Regiment pray before heading out on patrol in Baqouba, , 35 miles (60 kilometers) northeast of Baghdad, Iraq on Sunday, Nov. 30, 2008. (AP Photo/Maya Alleruzzo)AP - Barack Obama says the U.S.-Iraq security agreement approved by Iraq's parliament puts the U.S. on a "glide path" toward reducing forces there.



House Speaker Nancy Pelosi, D-Calif., center and junk-bond pioneer Michael Milken, left, sing the ABC song with elementary school students from Visitacion Valley Elementary School in San Francisco, Monday, Nov. 24, 2008. Pelosi and Milken help present first grade teacher Mindy Yip an award of $25,000 for the 2008 Milken National Education Award. (AP Photo/Paul Sakuma)AP - House Speaker Nancy Pelosi is promising Congress will try to have a huge economic recovery bill ready for President-elect Barack Obama as soon as he takes office.



Shoppers are reflected as they enter the Nike Store on Chicago's Magnificent Mile Saturday, Nov. 29, 2008. (AP Photo/Charles Rex Arbogast)AP - The Thanksgiving shopping weekend may not have been the disaster some had feared, but unprecedented discounts and tempered buying likely resulted in overall soft sales as a buying binge on Friday quickly fizzled. Now, online retailers are ramping up deals to turn skittish shoppers into "Cyber Monday" spenders.



Moshe Holtzberg, the 2-year-old orphan of the rabbi and his wife slain in the Mumbai Jewish center, cries during a memorial service at a synagogue in Mumbai, India, Monday, Dec. 1, 2008. Holtzberg will fly to Israel Monday on an Israeli Air Force jet with his parents' remains and the Indian woman who rescued him, an Israeli Foreign Ministry spokesman said. (AP Photo)AP - Soldiers removed the last bodies from the shattered Taj Mahal hotel Monday as India formally demanded Pakistan take "strong action" against those behind the 60-hour siege that left at least 172 people dead.



In this Nov. 4, 2008 file photo, Gov. Sarah Palin, R-Alaska, acknowledges the crowd during an election night rally in Phoenix.  Oprah wants her, and so do Letterman and Leno. Fresh from her political defeat, Sarah Palin is juggling offers to write books, appear in films and sit on dozens of interview couches at a rate astonishing for any first-term governor, let alone a Hollywood star.    (AP Photo/Elise Amendola, File)AP - Alaska Gov. Sarah Palin implored Georgia Republicans to back Sen. Saxby Chambliss in his hotly contested Senate runoff, telling a cheering crowd Monday that the first step in rebuilding the GOP begins with the Southern state.



AP - A measure of U.S. manufacturing activity fell to a 26-year low in November as new orders dropped for the twelfth consecutive month, a trade group said Monday.

AP - Israel has gotten fed up with spam. Anyone who sends out messages without receiving the recipient's consent can now be slapped with a big fine.

In this Nov. 20, 2008 file photo, Reese Witherspoon, a cast member in 'Four Christmases,' poses on the red carpet at the premiere of the film in Los Angeles. (AP Photo/Chris Pizzello, file)AP - Thanksgiving weekend movie crowds gobbled up the Reese Witherspoon and Vince Vaughn holiday comedy "Four Christmases," which debuted at No. 1 with $31.7 million, according to studio estimates Sunday.



New York Giants wide receiver Plaxico Burress arrives at a police station, Monday, Dec.1, 2008, in New York. Burress was expected to be charged after accidentally shooting himself in the right thigh. Burress shot himself at a Manhattan nightclub Friday night and was released from a hospital early Saturday, the Giants said. (AP Photo/ Louis Lanzano)AP - Plaxico Burress arrived at a police station early Monday, where he was expected to be charged after accidentally shooting himself in the right thigh at a Manhattan nightclub.



President-elect Barack Obama announces that Sen. Hillary Clinton will be his choice for Secretary of State during a news conference in Chicago December 1, 2008. (John Gress/Reuters)Reuters - President-elect Barack Obama named former rival Hillary Clinton as secretary of state on Monday and said Robert Gates would remain defense secretary as part of a national security team charged with recasting America's leadership of world affairs.



Members of ZAKA, Israel's non-governmental rescue-and-recovery organization which specializes in collecting human remains to ensure a proper Jewish burial, speak with policemen after performing religious rituals in front of Nariman House in Mumbai's Colaba area, December 1, 2008. (Jayanta Shaw/Reuters)Reuters - India said on Monday it had called Pakistan's envoy and informed him that deadly attacks in Mumbai were carried out by militants from Pakistan and demanded swift action against those responsible.



Tommy, from Sweden, holds his son Patrick while waiting with other stranded passengers to check-in for their flights, departing from U-Tapao, at a makeshift airline terminal in Bangkok, December 1, 2008. (Adrees Latif/Reuters)Reuters - Thai protesters prepared to end their three-month occupation of the Prime Minister's office on Monday to consolidate their grip on the main airport ahead of a court verdict that could dissolve the elected government.



Workers wearing T-shirts with company slogans at Siemens MR Center located at the Shenzhen High-Tech Industrial Park in the southern Chinese city of Shenzhen in Guangdong province, November 25, 2008. (Bobby Yip/Reuters)Reuters - European leaders clashed on Monday over how much public money to spend on battling recession as data showed factories were slashing output in the United States, Europe and China.



Speaker of the House Rep. Nancy Pelosi speaks during a news conference in the U.S. Capitol in Washington November 21, 2008. (Molly Riley/Reuters)Reuters - House of Representatives Speaker Nancy Pelosi met leading governors on Monday to discuss the size and shape of an economic stimulus package she hopes Barack Obama can sign when he becomes president on January 20.



Birmingham Mayor Larry P. Langford in an undated photo. (Handout/Reuters)Reuters - Federal authorities arrested the mayor of Birmingham, Alabama, on Monday in a corruption probe surrounding a massive sewer bond debt that has forced Jefferson County to the brink of bankruptcy.



A woman shops at a Walmart store on 'Black Friday' in Oakland, California, November 28, 2008. (Kimberly White/Reuters)Reuters - Key retail stocks fell on Monday as investors feared that deep discounts offered by U.S. stores during the year's first holiday shopping weekend could sap profits and would not save a bleak season.



Resident carry an injured victim of a blast at a local hospital in Swat Valley December 1, 2008. (Abdul Rehman/Reuters)Reuters - A suicide car-bomber killed eight people on Monday in an attack aimed at a military checkpost in northwest Pakistan's Swat Valley, military officials said.



A US soldier inspects his weapons before a patrol of Afghanistan's Helmand Province in May 2008. Barack Obama has nominated Hillary Clinton as his secretary of state as the US-president elect unveiled his national security team.(AFP/File/Massoud Hossaini)AFP - Barack Obama on Monday nominated his erstwhile political foe Hillary Clinton as his secretary of state, as he rolled out a muscular national security team rich in global political star power.



A Federal Bureau of Investagation (FBI) official leaves the police headquarters in Mumbai. India has formally accused AFP - India on Monday formally accused "elements" in Pakistan of being behind the devastating Islamic militant attacks in Mumbai and demanded that Islamabad take "strong action".




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