I am always amazed by reviews of sensor brushes that do not comment on the outrageous cost of a cheap brush supposedly designed for a DSLR. This must be because the reviews are by pros who are used to paying a fortune for lenses, tripods etc. Or maybe they earn so much that $100 is peanuts?
Well, whatever, take a look at the following link:
http://www.prime-junta.net/pont/How_to/a_B...our_Sensor.htmlBasically a 'sensor brush' is nothing more than a $5 nylon brush carefully washed in detergent. I've heard of numerous people using this technique without problems.
Why be ripped off by someone out to make a fast buck?
On a related note lens cleaning fluid is easily made from isopropyl alcohol and distilled water and I reckon it will also work on a sensor. Warning: I've not yet tried this and some solvents can dissolve the plastics used in cameras. So take care.
Note added 27/12/2005: I found that a rinse with isopropyl alcohol helped get the brush clean. A blower such as a Giotto rocket air can be used to charge the brush, and is suitable for carrying on aircraft. But store it in a dirt free container. Don't use the blower on the sensor as you might fire grit at it. I reckon the blower is okay for use on the mirror chamber and lenses, as long as it is stored and used away from dust or dirt.
Leif