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Old 03-05-2008, 04:55 AM   #32
Kevin W-S
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Join Date: Jun 2007
Posts: 67
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Sat next to some the one day, who was taking photos and kept taking off the 500mm and adding an extender. id this every 5 minutes - literally. I asked him about dust etc. and he said yes - a problem. Cleaned his sensors once or twice a day!

Me, I keep my old cameras so I have spares and do not have to change lenses so often. I have a 300d that is as good virtually in terms of quality as my 30d. Consider maybe buying an old second hand body if you swop lenses a lot!
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