Saturday, March 29, 2008
I'm Pissed Off/Oh, Hang On...
The image above is the result of using $14.95 of sensor swabs (3) on my admittedly very dirty sensor. Damn this is irritating.
OK, so despite some negative reviews of the sensorbrush system - spinning the brush to induce a static charge that will attract the dust, here's the same spot on the sensor after a good brushing.
There are still a dozen or so spots on the sensor, but that compares to probably thousands in the swabbed image. I had truly thought that the grime on the sensor would only respond to swabs but it appears I was wrong - I can comfortably live with a dozen spots, probably only one or two which will even show in the average image.
I exposed some sky to a manual metering of f32 and the exposure on the mark. I didn't do anything in camera raw and used auto levels in Photoshop to increase contrast dramatically for both images.
Some people find the sensor brush frustrating because it picks up oil from the mirror box and that gets transferred to the mirror. I have to tell you this sensor brush was sitting in a broken plastic box in which the lid was no longer attached, at the bottom of my accessory slot on my camera backpack, for the last six months of fairly regular shooting - I could actually see some black marks on the brush but hoped the marks were too far from the end of the bristles to affect the cleaning process - hardly ideal care - but it worked. Perhaps it's just luck, or more likely bad luck for those who do get oil on the brush. I certainly never use this brush to clean the mirror box or the mirror or even the ground glass below the pentaprism.
Take it for what it's worth. Here's hoping the new self cleaning sensors work as well as advertised (already there are mixed reviews).