Digital Camera

Digital Cameras have become a common site wherever you go. If you’re getting ready to purchase your first digital camera, or maybe you’re looking to replace one you already have, it is best to familiarize yourself with the knowledge of what makes one digital camera different from another and choose the one that is right for you. In this article we’ll cover one of the most significant factors in picture quality. This is the “digital film.”

Just like with a film camera, the digital camera has a lens which brings light into focus on a bed of light sensitive material. In the digital camera, that light sensitive material is a circuit bed called a “CCD.” The CCD plays the same role as film in a film camera and the lens allows light to fall onto the CCD which is then converted into a digital image. The quality of the lens can make a significant difference in the clarity of that image. Very cheap digital cameras may even use a piece of plastic as the lens, which will usually have an uneven surface and light transmission. This will be noticeable in the picture but may not be an issue for a security camera or a web cam. Better quality digital cameras will have ground-glass lens and high-end digital cameras will even have interchangeable lenses as do high-end film cameras. The lens still plays the important role of bringing light clearly to the CCD surface for a distortion free picture.

A CCD also provides an interesting advantage to the digital camera. It is possible to automatically adjust light sensitivity to improve contrast, shoot in dim light, or even take black and white, sepia or infrared and ultraviolet light pictures with the touch of a button. Because any of these images are stored as the same data on the memory card, a digital camera can offer unsurpassed versatility without the need to change film types. Not all digital cameras have these features built in, but they are options you may see in some cameras. While the possibilities are cool, ask yourself if you that is a feature you need in a digital camera.

With digital cameras, CCD is a grid of light sensitive points which capture the image for conversion into a digital image. The number of points on the CCD is measured in terms of “mega pixels.” The mega pixel rating is a completely new bit of terminology and is unique to the digital camera. The mega pixel rating is a measure of the resolution of the camera, or its ability to store details of am image. For example, a digital camera with a maximum resolution of 1280 by 768 pixels (dots) comes out to a total of 983,040 pixels with which to describe the digital image. As each mega pixel represents one million pixels, we can see this isn’t even one mega pixel. Some digital cameras have mega pixel ratings at 5.1 and even 7.1 mega pixels. What does this mean to you? The more pixels the more detail stored. If the image is going to be viewed on a screen or a TV, this isn’t very meaningful because video displays have resolutions which are usually well below one mega pixel. However, when printing on a high quality photo printer, the difference between a 3 mega pixel digital camera and a 5 mega pixel digital camera can be very obvious.

Some people will try to evaluate a mega pixel rating by how large a print can be made from the digital camera’s image. The truth is that any digital image can be printed to any size. The real issue is what it looks like. Most people print their film to 4×6 prints and many are now doing the same with their digital cameras. Ask to see printed samples of pictures which are like the type you would normally take and compare the same prints between different cameras. Many stores will try to dazzle you with colorful still life images of piles of multi-colored fruits and hot air balloons. Do you take pictures like that? Probably not, so perhaps they’re not the best images to be scrutinizing. If you take pictures of friends standing around, use each camera to take pictures of people standing around. Then use a demonstration printer at the store to make prints and look at the results. Do you see little dots in the middle of solid colors? Does the image look like it was taken with a poor quality film camera? Don’t seek out the digital camera that happens to take perfect pictures in a perfect setting, contrived by the marketing department of the digital camera’s manufacturer. Look for the digital camera that takes pictures you like in the settings in which you most commonly find yourself.

Another issue to consider is that some digital cameras are designed for “point and click” use while other cameras are designed with lots of settings which must be manipulated for optimal results. In my personal experience, I have found that Kodak makes digital cameras which are ideally suited for simple “point and click” use and consistently take great looking pictures in a wide variety of settings. I have also personally found that digital cameras from Nikon work best when you set them to “manual” and do not rely on the automatic settings. This seems to be true of their film cameras as well. Does this make one digital camera better than another? Only if one fits your needs and skills, and the other does not.

There are many magazines available on digital cameras today. Most recognize these differences in digital camera quality, based on needs and intended use of the owner. Before buying your new digital camera, pick up a few of these magazines and familiarize yourself with the latest reviews. Remember that the pros and cons are still written “through the lens” of the reviewer. If you see a negative about a digital camera that you otherwise like, ask yourself if that negative is meaningful to your needs. Next ask yourself if that negative might be meaningful to your needs as you become more experienced. If the answer is yes, ask yourself if you would still be using that camera as a more experienced photographer in the future or would you perhaps sell it and buy an entirely new digital camera? It’s unlikely that the digital camera you buy today is going to be the only one you’ll ever have. Buy the digital camera that most reasonably meets your needs and how you normally plan to take pictures.

Memory cards and battery life are also consideration factors which will be covered in other articles. For now, I hope this information has taught you more about the workings of a digital camera and some of the factors to consider when choosing one. Take your time and learn a bit about digital cameras before your purchase. Sure, it’s not like buying a car, but photography is a very personal experience and the right digital camera will truly make a difference in your enjoyment of capturing the moment with digital photography.

Dave Saunders is a nutritional educator and published author.
He enjoys writing on his many hobbies and passions.
You can find other news and articles on digital cameras at
aboutdigitalcameras.net

The Vacation Season is fast approaching and naturally you will be taking your digital camera along for the journey. After all your vacations are far and few between and it is nice to look back on those memories as you slave away at your job. However, when you travel with a digital camera, it is a completely different experience from that of traveling with a film camera. This is a lesson that far too many travelers seem to be learning the hard way, especially if you’re traveling to Europe. After a couples years of relying solely on digital camera for taking photos when I travel, there are things you should consider before you head off on your next trip.

Charging Batteries is one of the biggest stumbling blocks you’ll face when you travel. Outlets can be scarce in hotels. On a recent trip to Europe, only one of the five modern hotels I stayed in had more than one outlet available for use when charging up electronics. Charging your battery can be more of a hassle if you’re traveling by train: If you take an overnight train in Europe, they don’t have power adapters at the seats (certain trains do, but it’s not something you can count on). I suggest bringing at least two rechargeable batteries, three if you plan to travel with overnight trains, or don’t think you’ll be able to charge every night. If your camera uses regular AA batteries, consider yourself lucky-you’ll find those everywhere. Scope out the situation in your room when you check in: You should get at least one usable outlet, but don’t count on more than that.

Bring your plugs. Some digital cameras typically come with a power brick that can handle international voltages, so you won’t need a voltage adapter. However, you will need a power plug adapter to convert a US outlet plug to the local plug. Most of Europe is on the same outlet now-but not all countries accept the general “Europe” plug. Be sure to research what you’ll need to jack in, and try to buy it before you leave (try CompUSA, Radio Shack, Rand McNally, or your local luggage store). If you don’t have a chance to get what you need Stateside, don’t fret: You should have no trouble finding an outlet converter overseas.

How do I offload my images? For fellow travelers using digicams, this was the number one problem I have heard repeatedly. Many comments from folks traveling for a week or more are: “I’m taking more pictures than I expected to.” “I’m not shooting at the best resolution, because I need the room on my memory card.” “I’m only halfway through my trip, and I have only 50 shots left.” When you travel, odds are you’ll take more pictures than you expect to also. A 1 GB card is very useful, and should suffice for low-usage shooters. But for those of us, who can go through a gigabyte or more in a day, not a week? Whether it’s because your a high-volume shooter, shooting in RAW format, or a combination of the two. What I discovered is many who had digital SLRs, that had 5 megapixel or more reported they were traveling with a laptop to off load their images. None of these folks were traveling on business, so they didn’t need to bring a laptop along. The sad fact is, for now, a laptop remains the most efficient and usable means of off loading images. Epson and Nikon have dedicated handheld units with a hard drive, card reader, and LCD display for copying over and viewing your images. But neither has a full-blown keyboard.

If you’re first buying a laptop, and intend to travel with it, I suggest going for the smallest one you can. Fujitsu, Panasonic, Sharp, and Sony all have models under four pounds. A laptop provides several additional advantages. For one thing, you can see your pictures on a big screen-to view how you’re doing, and if you see any problems you want to correct with your exposure, for example, or if your pictures are being affected by dirt. For another thing, you can properly label your folders, so you know which pictures were taken where.

Most newer laptops have integrated memory card readers, but otherwise, you can buy a small external card reader. For the wire-free approach, use a PC Card slot adapter for your memory card; and invest in a 32-bit Cardbus adapter (Delkin and Lexar Media offer these), for speedier transfers. Nothing’s worse than coming back to the hotel after a long day of sightseeing, and needing to stay awake another 40 minutes just to off -load two 1 GB cards, at about 20 minutes a pop. If you bring a laptop, I also suggest investing in a portable hard drive.

A portable hard drive can serve multiple purposes: It can be a means of backing up your photos on the go; a means of giving you a way to take your photos with you if you have to leave your laptop unattended; and a means of expansion, if you somehow manage to fill up your laptop’s built-in hard disk. If you don’t want to bring a laptop, and already have an Apple iPod, Belkin sells an attachment for using your iPod with memory cards; or, consider the pricey units from Nikon and Epson. And if you’re in a bind, remember you can always buy memory overseas.

I was surprised that when I went to Europe, the prices were high, but not so outrageously so that I wouldn’t buy another card if I were in a bind. Cards were more readily available, too, than they were when I last traveled through Europe three years ago. Look at it this way: Even if you overpay on the card, you can still reuse it-which beats overpaying for a single use 35mm film cartridge when you were in a bind in years’ past.

Be prepared for problems. Things happen when you travel and I’ve had more things go awry carrying my digital SLR than I have had with my 35mm over the years. Lens paper is always useful to have on hand, but if you have a digital SLR, another supply is absolutely critical: An air blower bulb, to blast out the dust and dirt that will inevitably get trapped inside your camera. I never had problems with my 35mm SLR, but with my digital SLR, I constantly find dirt gets trapped inside, when I change lenses. And there’s nothing worse than having a splotch marring your otherwise awesome shots. Finally, remember the philosophy of redundancy.

Whether your battery dies and you have no way to charge it, or you run out of space on your memory card(s), and don’t want to buy another at a higher-than-usual price, I suggest packing a second camera if you can. A digital point and shoot is a good option but I usually carry a point and shoot 35mm to use if I run into any problems just so I won’t lose any precious pictures.

Doug Rogers has worked as a freelance photographer for the past 25 years in various fields of photography. In the past two years he has become an avid and devoted fan of digital and video photography and a life long lover of new technology. For tips on better digital photography and the latest reviews on the newest digital equipment that hits the market, Subscribe to his monthly Newsletter “The ViewFinder” at http://www.best-digital-cameras-review.com