Everything you need for digital camera sensor cleaning

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The exact appearance can change depending on the nature of the dust, image content and exposure settings see f-stop example below , but will likely look similar to the above example. In the above example, note how some of the spots are much fainter than the others look closely — there are at least eight. The right image is an actual cropped photo of dust spots against a clear sky. This is also why lower f-stop values make dust shadows more diffuse, since this light reaches the sensor over a wider angle, and therefore more easily passes around the sides of the particle. Other sources of dust include:. Try looking through your viewfinder and changing the f-stop while holding the depth of field preview button. Viewfinder dust will appear the same size regardless of the f-stop. This one is a little trickier to diagnose because spots on your lens may also impact your image. Try changing your camera lens to see if the spots remain. In either case, dust will become more apparent when you aim your camera at a clear sky or light-colored wall. How to Locate Sensor Dust. Are there more spots than you thought? Are these near the middle of the frame — potentially appearing unexpectedly with high f-stop portraits — or are they just at the edges? Some dust is often acceptable when weighed against the risk of scratching your sensor or SLR mirror during the cleaning process. The resulting image provides an excellent map of sensor dust. Just be aware that your dust map is flipped compared to the physical dust positions; spots at the top of the image are created by dust at the bottom of the sensor, for example. This is good, because replacing this filter is much less expensive than a new sensor it can usually be repaired by the manufacturer if you send your camera back. Why is it risky? Listed in order of increasing effectiveness but also of increasing risk , the most common types of cleaning devices include:. Sometimes several devices can be purchased together as a sensor cleaning kit, but if you only plan on purchasing or carrying one, the sensor brush or stamp is usually adequate. You are responsible for also consulting the instructions that came with your specific tool. Light blue represents the tip of your sensor cleaning swab or brush tool, and orange is the path followed by this tool. The dark rectangular region represents the camera sensor. Diagram assumes that your cleaning tool is the width of your sensor. Only follow this motion once; sweeping back and forth is both less effective and has more potential for damage. The old saying 'an ounce of prevention is worth a pound of cure' certainly applies to camera sensor dust. Edit out the spots. The clone and healing brush tools can be very effective ways of removing dust spots. Editing and RAW development software sometimes also have dust map features which digitally edit dust spots in the same locations of each photo. Have someone else clean the sensor. You can always send your camera to the manufacturer or a camera store so that it can be cleaned by a professional. If you plan on having a local store perform the cleaning, make sure to i verify up-front that they will insure your camera against any potential sensor damage, and ii check your camera by taking a test photo immediately after pick-up. For further reading on this topic, also see the tutorial on digital camera sensors , which provides an overview of how digital camera sensors work. Want to learn more? Discuss this and other articles in our digital photography forums. Photo Taken with a Dirty Camera Sensor. Example of a sensor pen although these can vary substantially in appearance. Example of the paddle used by a sensor swab without affixed lint-free tissue.

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