| |
| |
|
Abilene Professional Photographer's Guild |
|
|
|
Bracketing and How To Use Tt Correctly...
What Is... Exposure Bracketing Exposure bracketing is a simple technique professional photographers use to ensure they properly expose their pictures, especially in challenging lighting situations. When you expose for a scene, your camera's light meter will select an aperture / shutter speed combination that it believes will give a properly exposed picture. Exposure bracketing means that you take two more pictures: one slightly under-exposed (usually by dialing in a negative exposure compensation, say -1/3EV), and the second one slightly over-exposed (usually by dialing in a positive exposure compensation, say +1/3EV), again according to your camera's light meter. The reason you do this is because the camera might have been 'deceived' by the light (too much or too little) available and your main subject may be over- or under-exposed. By taking these three shots, you are making sure that if this were ever the case, then you would have properly compensated for it. As an example, say you are taking a scene where there is an abundance of light around your main subject (for example, at the beach on a sunny day, or surrounded by snow). In this case, using Weighted-Average metering, your camera might be 'deceived' by the abundance of light and expose for it by closing down the aperture and/or using a faster shuter speed (assuming ISO is constant), with the result that the main subject might be under-exposed. By taking an extra shot at a slight over-exposure, you would in fact be over-exposing the surroundings, but properly exposing the main subject. Another example would be the case where the surrounding might be too dark, and the camera exposes for the lack of light by either opening up the aperture and/or using a slower shutter speed (assuming ISO is constant), then the main subject might be over-exposed. By taking an extra shot at a slight under-exposure, you would in fact be under-exposing the surroundings, but properly exposing the main subject. Now, most digital cameras have auto exposure bracketing, meaning that if you select that option before taking your shot, the camera will automatically take three shots for you: one which it thinks it has perfectly exposed; a second one sightly under-exposed; and the third one slightly over-exposed. When should you use exposure bracketing? Anytime you feel the scene is a challenging one (too much highlights or shadows) as far as lighting is concerned, e.g. sunsets are usually better taken slightly under-exposed so use exposure bracketing there, or whenever you want to be sure you don't improperly expose a fabulous shot. Remember, you are not using film anymore, so there are really no wasted shots (unless you are severely constrained by the size of your storage media). Digital Dodging & Burning Should you delete the extra shots right away? No, if storage permits, keep all three shots until you get home and upload them to your PC and into an image editing software, such as Photoshop. By using the layers functionality of Photoshop (or similar functionality of another image editing software), you can load all three shots into different layers and then carefully erase the under-exposed or over-exposed part of one or more layers to end up with a final shot where both the main subject and the surroundings are properly exposed! This Photoshop functionality allows you to shoot in very extreme lighting situations where there are many parts in different intensity of light and shadows such that you are losing details in the highlights and shadows. In this case, you might need more than two extra shots to obtain details in the different parts. Without moving the camera (a tripod is essential here), take as many shots as you need, exposing for the different parts you want details to be visible. Then you would load them all up into Photoshop, each into its own layer, and by erasing the under- and over-exposed parts in each layer (granted, this equivalent of film 'dodging' and 'burning' can be a very tedious and challenging task in itself, but done properly it can be well worth the effort), you can end up with an 'impossible' shot where every part of the cave is properly exposed. Used judiciously, exposure bracketing is a simple technique that can ensure proper exposure of a difficult lighting situation.Make sure you get a camera with good manual Bracketing control Canon PowerShot S70 - Bracketing control
MORE RESOURCES:
Google News |
|
|
|
RELATED ARTICLES
Review of the Photek Product Shooting Tent Here's the challenge. You have to photograph small items for Ebay or for clients' brochures. Nikon Digital Cameras - Cool(pix) and Functional Even though Nikon entered the camera world by 1948, today its digital cameras are well known everywhere. The company started small but always dreamed big. Online Photo Sharing: Not Just for Family and Vacation Photos You may have joined the photo-sharing craze to share your family vacation photos, but have you thought about other uses for photo sharing?Here are just a few ideas:Scrapbooking: Show off your creative projects. You can design scrapbook pages and enhance them with clipart using software like Paint Shop Photo Album or FotoFinish and then upload them to a photo sharing site for everyone to enjoy. How a Digital Camera Works The digital camera is not something of a magic box that came out of the blue and made wonders! The digital camera is very much like the conventional analog camera, but the technology has been altered. It also contains most of the associated components that the conventional camera contains, like lens and a shutter for letting in light, however instead of reaching a photosensitive film, the light is made to fall upon array of image sensors or photosensitive cells. Landscape Photography - Capture the Beauty That is All Around There are many different types of photography. You can take pictures of anything and there is someone out there somewhere who would like to see the pictures that you take. The Alligator Farm - Home to Beautiful Winged Creatures Your first thought when you read "Alligator Farm" might be "tourist trap," but that could not be more inaccurate. And while the alligators are wonderful and plentiful at the place fondly referred to as the "Gator Farm," it is the birds that attract the world's best photographers. Is your Digital Camera Compatible With Your Computer? So you recently bought a digital camera or perhaps your thinking about it. And perhaps you may be wondering how many pictures will your computer hold? First you need to answer a few questions to come to an accurate conclusion. Inspired Vision A picture is worth a thousand words, so goes a Chinese proverb. A picture of a smiling child always brings a smile to our face and a picture of hungry and sick people always arouse feelingsof compassion. Tame Those Memories Family vacations, summer weddings and family reunions are in full swing, and the warm memories and envelopes of photographs are ever growing! You certainly intend to organize them -- but the boxes in the attic are full of intentions, and now the photograph CDs are being to pile up! What can you do to stop the madness?Step 1: Decide why you are saving the photographs. My mother- in-law, for example, wants to ensure them for future generations, which means acid-free paper and detailed labeling. Traveling to Europe with Your Digital Camera? 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. Digital Imaging Explained Digital Imaging is a process where an electronic photograph, scanned document, or image is converted into a series of electronic dots called pixels. Pixels is an acronym for "picture elements". Digital Camera Metering Looking at the most intricate details of the digital camera as a technologically advanced device a lot of functions come into play. Such s a point is that of the digital camera metering. Tips for Taking Better Vacation Photos Photos are a great way to share your travel experiences with family and friends. Here are a few suggestions to help you capture vacation memories you will treasure for years to come. Why 1.5 Megapixels is Enough Dots Per Inch is a useful measure of relative resolution. But if you don't know the image size in inches or some other measure of size, then the amount of dots per inch doesn't mean much. Tips for Purchasing a Digital Camera Lens Your lens is an essential element to good photographs. It's not just your camera. Photography Has No Gender Women photographers are fortunate. Unlike other titles, photographer has no gender. Selecting Good Stock Photography in the Age of Digital The business of stock photography has drastically changed over the last few years. Ten years ago, selecting photographs for your brochure or newsletter meant spending hours pouring over stock photography catalogs and ordering photo research to find the exact image. The Beginner Buyers Guide To Digital Cameras, Or The Ins And Outs Of Megapixels The most important part of buying a digital camera is making sure that the one you select meets all of your needs.Digital Camera 101Better digital cameras uses a chip called a "Charged Coupled Device" (CCD) instead of film. Wildlife Scouting Cameras For years I wondered how big the bucks were that were roaming our property in the dark of night. After all, I knew that monster bucks had to be eluding me during the daylight hours only to roam the woods at night. Start Up a Nude Photography Business There are major obstacles to overcome to get into nude photography, not least of which is the need to practise technique. By its very nature there has to be at least one subject, and the big problem for the photographer here is image.
|
| home | site map |
| © 2009 Professional Photographers Guild Of Abilene, Abilene Texas |
