On 22 Jul 2004, at 23:30, Box Croxford wrote:
Are you using the gas cylinders?
The only compressed air that I use are some C02 canisters, rather like sparklets canisters for making fizzy drinks which i get from Fixation. I try and use them as little as possible as there is no doubt that most "air" canisters dump micro dots of propellant onto the imager if aimed directly at it. A conversation with a physicist reminded me of hot dull afternoon's not paying attention in double-physics and hence not remembering Boyles Law.
In short his suggestion was that the sudden release of pressure would cool micro-particles and the resultant drop of condensation would create exaclty that doughnut shaped grey ring which one gets on the imager if one aims an air canister directly at the imager.
Dusting / wetting your floor. Me too - I watched Mickey at Fixation cleaning an imager and it was like being in a surgical theatre. He suggests that cameras should actually be kept in plastic bags in the camera bag and that bags should be regularly hoovered etc and the plastic bags changed on regular basis. I use a paint brush to clean off the lens and body before detaching the lens. He also rolls the tips of tweezers into sellotape so that sticky side is outwards and runs that around the shutter box to collect dust.
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