Digital Camera Basics-resolution, Exposure, Focus, and Storage

Resolution

The amount of detail that a camera can capture is called the resolution, and it is measured in pixels. The more pixels a camera has, the more detail it can capture and the larger pictures can be without becoming blurry or "grainy." High-end consumer cameras can capture over 12 million pixels. Some professional cameras support over 16 million pixels (megapixels), or 20 million pixels for large-format cameras. For comparison, it has been estimated that the quality of 35mm film is about 20 million pixels.

Exposure and Focus

Just as with film, a digital camera has to control the amount of light that reaches the sensor. The two components it uses to do this, the aperture and shutter speed, are also present on conventional cameras.

Aperture: The size of the opening in the camera. The aperture is automatic in most digital cameras, but some allow manual adjustment to give professionals and hobbyists more control over the final image.

Shutter speed: The amount of time that light can pass through the aperture. Unlike film, the light sensor in a digital camera can be reset electronically, so digital cameras have a digital shutter rather than a mechanical shutter.

These two aspects work together to capture the amount of light needed to make a good image. In photographic terms, they set the exposure of the sensor.

In addition to controlling the amount of light, the camera has to adjust the lenses to control how the light is focused on the sensor. In general, the lenses on digital cameras are very similar to conventional camera lenses -- some digital cameras can even use conventional lenses. Most use automatic focusing techniques.

The focal length, however, is one important difference between the lens of a digital camera and the lens of a 35mm camera. The focal length is the distance between the lens and the surface of the sensor. Sensors from different manufacturers vary widely in size, but in general they're smaller than a piece of 35mm film. In order to project the image onto a smaller sensor, the focal length is shortened by the same proportion.

Focal length also determines the magnification, or zoom, when you look through the camera. In 35mm cameras, a 50mm lens gives a natural view of the subject. Increasing the focal length increases the magnification, and objects appear to get closer. The reverse happens when decreasing the focal length. A zoom lens is any lens that has an adjustable focal length, and digital cameras can have optical or digital zoom -- some have both. Some cameras also have macro focusing capability, meaning that the camera can take pictures from very close to the subject.

Digital cameras have one of four types of lenses:

1) Fixed-focus, fixed-zoom lenses - These are the kinds of lenses on disposable and inexpensive film cameras -- inexpensive and great for snapshots, but fairly limited.

2) Optical-zoom lenses with automatic focus - Similar to the lens on a video camcorder, these have "wide" and "telephoto" options and automatic focus. The camera may or may not support manual focus. These actually change the focal length of the lens rather than just magnifying the information that hits the sensor.

3) Digital-zoom lenses - With digital zoom, the camera takes pixels from the center of the image sensor and interpolates (alters) them to make a full-sized image. Depending on the resolution of the image and the sensor, this approach may create a grainy or fuzzy image. You can manually do the same thing with image processing software -- simply snap a picture, cut out the center and magnify it.

4) Replaceable lens systems - These are similar to the replaceable lenses on a 35mm camera. Some digital cameras can use 35mm camera lenses.

Storage of Images

Most digital cameras have an LCD screen so you can view your picture right away. This is one of the great advantages of a digital camera -- you get immediate feedback on what you capture. Of course, viewing the image on your camera would lose its charm if that's all you could do. You want to be able to load the picture into your computer or send it directly to a printer. There are several ways to do this.

Although most of today's cameras are capable of connecting through serial, parallel, SCSI, USB, or FireWire connections, they usually also use some sort of removable storage device. Digital cameras use a number of storage systems. These are like reusable, digital film, and they use a caddy or card reader to transfer the data to a computer. Many involve fixed or removable flash memory. Digital camera manufacturers often develop their own proprietary flash memory devices, including SmartMedia cards, CompactFlash cards and Memory Sticks. Other removable storage device include floppy disks, hard disks (external, or microdrives), and writeable CD's and DVD's.

Regardless of what type of storage they use, all digital cameras need lots of room for pictures. They usually store images in one of two formats -- TIFF, which is uncompressed, and JPEG, which is compressed. Most cameras use the JPEG file format for storing pictures, and they sometimes offer quality settings (such as medium or high).

To make the most of their storage space, almost all digital cameras use some sort of additional data compression to make the files smaller. One compression routine takes advantage of patterns that repeat. The image can be reconstructed exactly as it was recorded, reducing the file size no more than 50%, often much less. Another compression routine called irrelevancy eliminates some of the more meaningless data, taking advantage of the fact that digital cameras record more information than the human eye can easily detect.

Author: Brian Lee

5 Keys to Building Wealth Online

If you are wondering about the keys required to build online wealth, then you have stumbled upon the only source that you will ever need. If you would employ the keys presented here, you would be destined to overcome almost every reason that people fail to build online wealth. The keys are very similar to the keys to build wealth offline as well. So let’s not linger, let’s get to it.

Key #1: Make yourself visible. On your website, provide all information necessary for potential customers to get in touch with you. This info should include an e-mail address, your picture, and your phone number – at least your business number. A personal address is nice, at least the city and state that your are in.

Key #2: Be unique. Everyone has their own set of special knowledge, use yours. Even if you don’t feel like it, you have information that only you know. Be yourself. Express yourself. Be honest and believe in your own approach to presenting your business.

Key #3: Be customer oriented. Tap in to your website with the eyes of a stranger – like your customers will be. View it. Read it. Experience it. And then edit it. Continue to edit out the bad and enhance the good elements of your website. Listen to the input of your visitors. Isn’t it they that you try to please?

Key #4: Automation. The use of auto-responders will catapult you to unseen levels of success. Know that statistics show that the average customer doesn’t make a purchase from a website until they have been exposed to it between seven and nine times.

Key #5: Use online advertising techniques like blog spots and article directories. Don’t forget to engage in offline advertising tactics as well. Newspapers, periodicals, radio, television, magnetic signs on your vehicle and signs along the roadways are all valid resources. Use anything to get people to hit your website, and then deliver their needs to them like you would want yours delivered to you.

Constantly involve yourself in learning about business techniques in general. Online business is still business. It’s time to get down to business.

Author: will smithston

Acne Solution From a Pill

Sandra Wellman

Most people believe the only way to cure their acne problem is
from the outside. Well, you definitely need to keep your skin
clean, but often, acne sufferers scrub too hard or use harsh
chemicals to try to clean deep. This can actually make matters
worse. Simply clean your face at least twice per day with a mild
cleanser, especially after sweating. I keep a bottle of
astringent in the shower b/c I don't like cleaning my face with
soap like some people (my husband). Soap seems to leave a
residual, as far as I'm concerned. And women, I know you won't
like this, but try to wear as little makeup as infrequently as
you can get away with or put up with. It just clogs your pores.
When you do wear it, make sure you clean your face before you go
to bed, even if it's late. Just do a quick job!



Home remedies for acne are much better than prescriptions,
especially the ones with side effects like Accutane®. You could
feel sick, get liver problems, get depressed and worse yet, your
child may have birth defects from using it! Be careful what you
choose to cure your acne with. Read all ingredients and warnings.



Using a natural acne remedy on the inside and out is your
best acne solution. For exterior cleaning, try to find a product
without alcohol, as it will dry your skin. Tea Tree oil is
natural, but also very strong. I wouldn't use it for mild to
moderate acne unless it had other ingredients in it to dilute
it. If you have severe acne, that may work for you. An acne
product that protects your skin and prevents acne from coming
back is even better. There's one listed on my web site, see
below.



Now, about cleaning acne from the inside out; this may seem a
bit strange to you, but a lot of acne is caused by internal
imbalances and/or impurities. Chocolate doesn't really cause
acne, unless you are allergic to it, but eating junk food
definitely won't help you. Eating too many white carbohydrates
creates a pasty like sludge substance in your intestines and
bacteria love to stick to it, gross! That's partly why you are
told to avoid white starches and sugars, but that's a subject
for a different day.



Antioxidants, like Vitamin C, E and Alpha Lipoic Acid, are very
helpful in clearing acne. Aloe Vera is an anti-viral as well as
an anti-microbial, that can help cleanse you from the inside
out. Hydrolyzed Collagen prevents moisture loss. Wouldn't it be
nice if you could get all these, plus DMAE, Co-enzyme Q10 and
Bioperine all in one capsule you only have to take once per day?
Yes, there is an acne solution from a pill! You can clear your
acne from the inside out. Go to my web site to find out how: href="http://www.acne-and-hair-loss-solutions.com/">http://www.ac
ne-and-hair-loss-solutions.com/.



About the author:


Sandra Wellman is the owner of a web site about natural acne and
hair loss solutions, including articles, tapes, cd's, ebooks and
natural products. Visit her site at: href="http://www.acne-and-hair-loss-solutions.com/">http://www.ac
ne-and-hair-loss-solutions.com/.

Sourcing Out Information for the Love and Passion of Old Coins

There are many people who collect various types of coins. Some of these coins are rare coins from different parts of the world, others are American Eagle coins, and there are still others who have a passion for old coins of all sorts. These old coins don’t have to be from one country or even from period in time. With coin collectors the main item that counts is that these coins are from an early period in our history.

As old coins sometimes come to light it may be necessary for the coin collector or numismatist to find information about the old coins that they have in their collection. As these old coins may have some of their identifying marks worn away either completely or partially you may want to store them in a protective coin folder until you have gathered enough information that will help you to know what type of old coins you have.

This information process will take some time unless you have an idea of where you should start your search. The information that you will need, is the country of origin and hopefully the date the coin was minted. You can also use the portrait that may still be found on the old coin.

When you have found this information you should start looking in coin books to see if you can find some history about these coins. While the history doesn’t have to be very extensive it should give you an idea about the period when these old coins were minted. You will need this information so that you can have an identification given to these old coins. The background information will need to be stated in a place where you can match it with the old coin that it belongs to.

Since it helps to have an idea of the cost of the various old coins that you have you may want to have these old coins valued. The best place for you to find more information on the old coins and what they are priced at would be your local coin shop. Here you will get an appraisal that will inform you about the current value of your entire collection. You can even get a separate appraisal done for all the old coins in your coin collection.

This appraisal helps you to see which coins are bringing the value of your collection down and which coins you may want to see about buying more of. With the selection of old coins you should look for ones that you feel will show the full worth of your coin collection.

Author: Muna wa Wanjiru

Acne Rosacea - How to Effectively Treat Rosacea Symptoms

Danna Schneider

Rosacea - How to Naturally Calm and Eliminate Rosacea and
Acne Rosacea



Acne Rosacea and Rosacea are fairly common skin disorders that
primarily affect fair skinned people in their 30's and over.
While it's exact cause is difficult to pinpoint, the symptoms of
Rosacea are obvious in their manifestation on the facial skin.



Typical Rosacea symptoms are a combination of any of the
following: Red looking, flushed skin - especially on the nose
and the cheeks, small, dilated blood vessels known as
telangiectases may appear in the background, inflamed red bumps
sometimes with a yellow head (acne rosacea), a shiny, oily
appearance to the skin, and roughness, or "orange peel" like
texture of the affected skin.



Acne rosacea is the more severe of the two, and definitely is
more noticeable, as it not only manifests itself in skin
redness, but also in acne-like postules that infect and swell,
making the skin bumpy and inflamed.



Rosacea is typically aggravated by alcoholic beverage
consumption, hot or spicy foods, some types of common cosmetic
ingredients, sun exposure, hot baths, hot tubs, saunas, and the
consumption of hot drinks.



People who suffer from Rosacea are typically advised to avoid
these triggers, but this of course is not always possible. While
it is not possible to actually cure Rosacea, since the
underlying cause seems to elude scientists, there are ways of
controlling it that are very effective.



The Most Commonly Prescribed Rosacea Treatments



Many who suffer from this skin disorder do seek the advice and
prescribing authority of a dermatologist to control it. The most
common dermatologist-prescribed method of controlling Rosacea is
through the utilization of a topical antibiotic.



While this can be effective in controlling the problem, it is
mostly temporary, and the problem returns immediately after the
treatment stops. This can also be a problem for those who may
not have the time or the money for the dermatologist visits and
prescription refills.



Why Go for a Natural Remedy Rather than a Medical
Treatment?



With today's nutraceutical and cosmeceutical advancements, there
are so many treatments available that either equal prescription
skin care treatments, and even outperform them. The best part
is, you don't have to take the time out for the dermatologist
appointment, and you don't have to pay the high recurring costs
of prescription refills and return appointments.



This holds true for Rosacea and Acne Rosacea treatments also.
Many people have had huge success with natural Rosacea
treatments and systems - one in particular.



The marriage of pharmaceutical technology and nature has indeed
spawned some of the greatest cosmetic correction innovations
that we now are able to take advantage of today. With the proper
skin care regimen, some lifestyle cautions and common sense
avoidances, Rosacea is indeed a treatable skin condition, and it
can be treated equally as well without prescription, man-made
medications. Natural is always better, and these new and
innovative Acne Rosacea products definitely prove just that.



About the author:


See href="http://www.cosmeticsgalore.com/acne-rosacea-treatments.html
">Acne Rosacea Treatments for more information on how
to naturally treat and ultimately eliminate rosacea and acne
rosacea. Danna Schneider is the webmaster of href="http://www.cosmeticsgalore.com">Cosmetic Product
Reviews, a site dedicated to providing reviews and
articles on the most effective natural cosmetic correction.

Thinking About Buying a Digital Camera

Photographic prints, either at home, or via a development laboratory, or a self-service kiosk, are not the only options – digitised images can, for example, be uploaded to a digital photo frame, displayed on the Internet, or emailed to friends, to name but a few of the possibilities.

Types of Digital Camera

Digital cameras can be classified, broadly speaking, by their resolution – the maximum number of picture elements, or “pixels” that captured images can contain – usually expressed in millions of pixels, or “megapixels” (Mp). The more pixels an image contains, the less grainy, or “blocky” it is, so the greater is its overall quality. Less expensive digital cameras normally have a resolution of, perhaps, 1 or 2 Mp, and are perfectly adequate for producing images for the Internet, or email, or for smaller, say, 6 x 4 inch, photographic prints. Larger prints require a higher resolution, perhaps 7 or 8 Mp for 10 x 8 inch prints, and digital cameras of this type usually have higher memory capacity – a higher resolution image requires more storage space than one at a lower resolution – better zoom facilities, and other features. The Mustek DBV400 digital camera, for example, offers a resolution of 4 Mp, and the Mustek DV8200 model a resolution of 8 Mp.

Other Considerations

The level of complexity and sophistication that require in a finished image, or photograph, will determine the overall type of digital camera that you choose, and the same is true of some of the other features and functions that you may encounter.

For example, you may wish to download images from your digital camera to your computer – but this could be, perhaps, a single photograph, or at most a few photographs, which you want to email to a friend, every once in a while – or, on the other hand, a large number of high resolution images that you regularly need to download, for manipulation and editing purposes.

In the first case, you may well be able to get away with somewhat outdated transfer methods, such as floppy disk, or serial, or parallel cables, but these are limited, in both speed and the volume of data that can be transferred. In the second case, however, a faster, more sophisticated method of transferring data will be required, and you should consider a USB (“Universal Serial Bus”) 2.0 connection, or, perhaps better still, a memory card reader. The Mustek DV8200 model, for example, is an 8 Mp digital camera, which includes a USB 2.0 interface and cable.

Conclusion

Try to be realistic in your assessment of your needs, rather than just your “wants”, when it comes to finally choosing a digital camera. Increasing quality, and functionality, quickly adds fairly significantly to the price tag, so set yourself a target specification, and target budget, if you can – and stick to it.

Author: Alicia Taylor

Acne Laser Treatments - How They Help With Scarring and Formation of Acne

Danna Schneider

Acne Laser Treatment - How You Can Now "Do It Yourself" at
Home for a Fraction of the Price, and Get the Same Results



There are always new ways to treat acne coming out as the latest
and greatest method to treat acne and smooth the skin out to its
pre-acne days. Some of these methods are really not effective,
and cause consumers to just pour their money down the drain, so
to speak, in hopes of finally finding the answer to their acne
woes.



Others, like acne laser treatment, are a truly effective and
proven way to clear acne, help mend the skin, and help heal
scarring and existing acne lesions.



How Does Acne Laser Treatment Treat Scarring and Acne at the
Same Time



Lasers work by using various "soft pulsing light" wavelengths
and intensities to help "reshape" scar tissue, making raised
scars go down, and reducing the redness of the skin around
healed acne postules. Home acne lasers actually emit a low,
constant frequency of red light which helps to stimulate
collagen, making scarring less visible, and helping to stimulate
the healing of existing acne, and speed the whole recovery
process.



The low light acne home laser does not emit heat and does not
hurt or burn your tissues - quite the contrary, you will feel
like you've just had a refreshing facial after you use it each
time - I did. Not only that, if you have any fine lines or
wrinkles, you will notice that they soften with the use of this
laser as well.



One particular medical grade home acne laser treatment that
uses this technology had the following to report:



1. The home laser device was found to be an effective treatment
for acne in the inflammatory stage.



2. Subjects typically would see positive results within 3-6
weeks of starting treatment. The positive results depended
largely on consistency and continuity of treatment. Especially
in the first few weeks, consistency is key if you want to see
real results from a home laser



3. After 6 Weeks of Laser Treatment:



20% of the patients were completely healed.



50% of the patients showed major improvement.



20% of the patients showed minor improvement.



These are pretty compelling statistics, and I'd say very
promising for anyone looking to treat their acne and reduce acne
scarring effectively, without countless visits to the
dermatologist or a plastic surgeons office for essentially the
same treatment.



If You REALLY Want to Get Astounding Results, Take it a Step
Further and Combine Laser Therapy with a Natural Oral Remedy



You can achieve even greater and faster success when combining
an oral remedy for acne and the laser. This fights acne from
both a scarring and healing aspect on the outside, and from an
internal standpoint, eradicating impurities and hormonal
imbalances which cause the acne in the first place.



Many dermatologists take this two pronged approach, and they
will combine a microdermabrasion or laser therapy with an oral
antibiotic for maximum results for their patients. Why can't you
do the same and get identical results, or even better results
than doctor's office treatments?



The fact is, there are other options that are less expensive
over the long haul and many times even more effective than
medications or special in-office treatments can be. Why not take
advantage of this advanced technology?



About the author:


Visit href="http://www.cosmeticsgalore.com/acne-laser-treatment.html">
Acne Laser Treatment for more information on the best
home acne laser treatment that covers the most surface area of
any home laser. Danna Schneider is the founder of
CosmeticsGalore.com. Visit href="http://www.cosmeticsgalore.com/acuzine-reviews.html">Acu
zine Natural Acne Pill Review for info on a cutting edge
natural acne remedy.