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  1. 1. Digital Single-Lens Reflex Camera http://dslrzone.blogspot.com/
  2. 2. Introduction Digital Single-lens Reflex Camera, or DSLR, is a type of digital camera that provides the capability of interchanging lenses and wider photo-shooting options than normal consumer cameras. It serves the purpose of capturing images in digital formatA DSLR contains a photographic lens, a viewfinder, a shutter, and an image sensor. http://dslrzone.blogspot.com/
  3. 3. So What is the REAL difference between adigital SLR and a point and shoot camera? http://dslrzone.blogspot.com/
  4. 4. But Why? How can a 6 megapixel DSLR take a better picture than a 10 megapixel point and shoot? Because Size Matters! http://dslrzone.blogspot.com/2006-06-01
  5. 5. - Each digital image is made from millions of tiny squares,known as pixels.- Essentially, an image is recorded by tiny microlenses(pixels) which make up the cameras sensor http://dslrzone.blogspot.com/
  6. 6. When DSLR is not CapturingImage The photographic lens located in front of the camera directs lights into the camera body. Light is then reflected by the mirror to the pentaprism and finally travels to the viewfinder where photographers can observe the scene. Notice that the mirror is flipped down and the shutter covers the image sensor from recording lights http://dslrzone.blogspot.com/
  7. 7. Design of a DSLRWhen Capturing an Image The image capturing process starts when the shutter release button is pressed. Notice the mirror is flipped up from its original position, allowing light to travel to the sensor area. The shutter that covers the image sensor is now fully opened, and the image sensor is exposed under light and will be capturing the image. http://dslrzone.blogspot.com/
  8. 8. Specific PartThe Image Sensor – The Introduction • Image Sensor is the key device in DSLR, and serves the same function of capturing images as traditional films • Image sensor is basically a silicon chip containing millions of light sensitive element called photosite, and is covered by a layer of color filter http://dslrzone.blogspot.com/
  9. 9. • All Pixels are not created equal!• -A digital sensor is essentially made up of millions of tiny micro-lenses (pixels)• - Pixels are analog devices which record light and color data• - Larger Sensors contain larger pixels, which are much better and collecting this data http://dslrzone.blogspot.com/
  10. 10. Digital Camera Features and Technologies• Megapixels – Determine the total size (Dimensions) of the image recorded by camera• - More MP does not always mean a better picture• - Digital Image dimensions do not equal print dimensions• - For example a full quality image from an 8 megapixel camera• will produce a digital image measuring approximately 9X14 inches but printing standards say that you should not print to “Photo Quality” any larger than 8X10 http://dslrzone.blogspot.com/
  11. 11. Movement Compensation• Refers to the cameras ability to correct small movements by the user while taking a picture, in order to reduce the blur caused by camera shake.• Very Useful in low-light or telephoto situations Represented differently by different companies: • Nikon – VR – Vibration Reduction • Canon – IS – Image Stabilization • Pentax – SR – Shake Reduction • Sony – SSS – Super Steady-Shot http://dslrzone.blogspot.com/
  12. 12. Dust Reduction• Dust is more of a problem in DSLRs due to changing lenses• Once dust gets on your sensor, it can be difficult to remove• Dust reduction is essentially a mechanism which shakes the cameras sensor to free any clinging dust particles• Special anti-static coatings or filters may also be used http://dslrzone.blogspot.com/
  13. 13. Exposure• A “correct” or “good” exposure occurs when you maintain as much detail as possible in both the very bright parts (highlights) as well as the very dark parts (shadows) of an image. How much of a range in which you can capture detail from light to dark is referred to as the Dynamic Range. As you are about to see, there can be many “correct” or “good” exposures• There are three factors which influence the exposure of your image:• -Shutter Speed• -Aperture• -ISO http://dslrzone.blogspot.com/
  14. 14. Shutter SpeedThe shutter speed is the length of time the shutter is open. Acamera’s shutter performs the same function as a shutter in frontof a window—it keeps the light out. When the shutter isopened, light enters and is recorded as “computer language” onthe sensor and immediately “written” to the memory card. (It’smore complex than this and I don’t understand it all. Thecaptured data are changed by the camera’s software if shootingin jpeg. Other changes may be made of shooting in certainmodes.) The longer the shutter is open the more light enters. On somecameras, shutter speeds range from 1/8000 Th to 30 seconds.Normal working ranges for outdoor photography range fromabout 1/30Th to 1/500Th of a second—depending. Manycameras also have a B” setting, which allows the shutter to beopened indefinitely. When set at “B,” the shutter remains openas long as the shutter button is pressed. http://dslrzone.blogspot.com/
  15. 15. Aperture• An is defined as a hole or opening through which light is admitted.• Inside the camera lens is a system of blades which open and close to increase or decrease the opening through which light passes into the camera http://dslrzone.blogspot.com/
  16. 16. ISO• Refers to the light sensitivity of the sensor• HIGH ISO value means the sensor will be MORE sensitive to light, meaning it will take LESS LIGHT to get the right exposure• Similar to Film Speeds in 35mm format ISO is a measure of the sensor’s sensitivity to light. A high ISO reacts to light in less time than a lower ISO. DSLRs typically have ISO settings that range form 100 to 6400. Like shutter speeds and apertures, the difference between two adjacent ISO numbers is equivalent of one stop. An ISO 100 setting requires twice the exposure as an ISO of 200 —meaning the shutter speed has to be half as fast, or the aperture opened one f-stop, say, from f8 to f5.6 http://dslrzone.blogspot.com/
  17. 17. Backlight - eliminates dark shadows when light is comingfrom behind a subject, or when the subject is in the shade. The built-in f lash automatically fires to "fill in" the shadows. Beach/Snow - photograph beach, snow and sunlit waterscenes. Exposure and white balance are set to help prevent the scene from becoming washed out looking.ds. Use of tripod recommended. http://dslrzone.blogspot.com/
  18. 18. Fireworks - shutter speed and exposure are set for shooting fireworks; pre-focusing & use of tripod recommended. Landscape - take photos of wide scenes. Camera automatically focuses on a distant object. Macro - take close-up shots of small objects, f lowers and insects. Lens can be moved closer to the subject than in other modes. Hold the camera steady or use a tripod. http://dslrzone.blogspot.com/
  19. 19. Night Portrait - take photos of a subject against a night scene. The built-in f lash and red-eye reduction are enabled; shutter-speeds are low. Use of tripod recommended.Night Scene - photograph nightscapes. Preprogrammed to use slow shutter speeds. Use of tripod recommended. http://dslrzone.blogspot.com/
  20. 20. Party - take photos in a dim lit room; exposure and shutter speed are automatically adjusted for room brightness.Captures indoor background lighting or candlelight. Hold the camera very steady when using this mode. http://dslrzone.blogspot.com/
  21. 21. Portrait - main subject is clearly focused and thebackground is out of focus (has less depth of field). Bestwhen taking shots outside during the day. Shoot using a mid to long telephoto lens, stand close to your subject within the recommended camera range and, whenpossible, select an uncomplicated background that is far from the subject. http://dslrzone.blogspot.com/
  22. 22. Sports (also called Kids & Pets)- take photos of a fastmoving subject; fast shutter speeds "freeze" the action.Best when shots are taken in bright light; pre-focusing recommended.Sunset - take photos of sunsets and sunrises; helps keep the deep hues in the scene. http://dslrzone.blogspot.com/
  23. 23. TANK YOU VISIT AGAINhttp://dslrzone.blogspot.com/http://dslrzone.blogspot.com/