Digital SLR and sensor dust.

Acropora samoensis image with heavy sensor dust visible on the right side of the image

Shooting at relatively wide aperture, you may not even know your sensor has dust. Suddenly you get the opportunity to shoot some macro images. Excitedly, you open the RAW files in your processing software only to realize you have the dreaded “sensor dust”, the bane of every macro photographer. Over time, especially with heavy lens changes, or, in my case, extremely dirty fieldwork, the “sensor” of a DSLR can become dusty. Actually, “sensor dust” is a bit of a misnomer: the dust is not actually on the sensor, but on the filter that coats the sensor. If you want to check whether your (DSLR) body is infested, and how badly, stop the aperture down very tight, say f16, and take a photo of a white surface. Make sure you are sitting down when you open the resulting image in your processing software… Opinions on the best way to clean sensors range far and wide, and there are a variety of resources out on the web as to how you, the user, can clean the sensor without sending back to the manufacturer.

About Chris Maupin

Chris Maupin is a Ph.D. candidate in the Climate System Science program at the Jackson School of Geosciences at the University of Texas at Austin. Chris was born and raised in south Florida, and during high school, interned for Mote Marine Laboratory. While receiving his B.S. in marine science and chemistry from Eckerd College in St. Petersburg, he worked as the coral aquarist at Mote Marine Aquarium, maintaining a collection of rescue corals from the Florida Keys, including Acropora cervicornis. He received an M.S. in oceanography from the University of South Florida. Chris’ primary research interests involve using coral skeletons and cave deposits from the tropical west Pacific to reconstruct patterns of climate variability over the last 10,000 years.

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2 Responses to Digital SLR and sensor dust.

Gary Parr says:

February 23, 2012 at 9:37 am

Dust is less of an issue these days with cameras that offer ultrasonic sensor cleaning features. When you have dust on your sensor, the first step is to put the camera in sensor-cleaning mode and use a blower. Hold the camera face down to increase the chances that the dust will fall out of the housing. The best blowers are the Rocket units because they draw air in from the bulb end and shoot it out through the nozzle. Most bulb blowers suck “new” air in through the nozzle, effectively inhaling the dust you just blew out of the camera housing and re-depositing it with the next blow.

If the blower doesn’t get the job done, and having tried just about everything to clean dust, I’ve found the Arctic Butterfly tool to be most effective. See it here: http://www.visibledust.com/products3.php?pid=3

When changing lenses in the field you can prevent a lot of dust by first turning your camera off. Place your body with the wind to your back. Have the “next” lens ready. Remove the lens from the camera body, keeping the camera front facing down. As quickly as possible, insert the next lens. It also, obviously, helps if you minimize lens changes in the field, particularly on windy days.

Gary
Chris Maupin says:

February 23, 2012 at 10:02 am

Good stuff Gary!

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Digital SLR and sensor dust.

About Chris Maupin

2 Responses to Digital SLR and sensor dust.

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