A lot of people have a terrible fear to clean the sensor of his camera, but there are two facts to consider:
- Every time I change my lenses (twice a day?), I have a new mote of dust.
- A professional cleaning is very expensive and it takes too much time.
The cleaning of the sensor is a taboo topic, but I think this is a necessary knowledge for every photographer that use several lenses with a same body.
In the Internet you can read a lot about this topic. The better method I've found is using isopropyl alcohol. This is a very volatile substance. You can clean the sensor with it and it is evaporated immediately without residues.
- This method could causes damages in your gear out of the limits of the guarantee (do it at your own risk).
- I have less dust at the end of the process, but can't eliminate all the dust.
- Isopropyl alcohol (you can buy it in a pharmacy).
- Swabs (in a pharmacy too).
- Pipette (in a pharmacy too).
- Air blower (in a pharmacy too).
The first you have to do is activate the option mirror lock-up. Now you have a direct way to the sensor. Firstly, you should blow with the air blower and, after, try to take a picture. Take a picture to a white wall or a clean blue sky with the maximum f-number possible. Maybe the dust is now disappeared. If you have dust yet, you should clean the sensor with isopropyl alcohol. Take some alcohol with the pipette and put only a drop in a swab (too much alcohol can generate stains in the sensor). Clean with the wet swab (with alcohol, you mustn't use water) the sensor carefully. You can dry the sensor with a dry swab (or wait, the isopropyl alcohol is very volatile). You can also blow a last time with the air blower (I prefer don't follow the last step).
After use this process I haven't had problems with the camera, but I also haven't had success eliminating all the dust. I've decreased the amount of dust and it is inappreciable with low f-numbers, but the dust always comes back to my camera when I use high f-numbers. It's a problem I hope solve soon... but not today.