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Rant: stop cleaning focus screen rings with canned air, I just trashed a customer's Nikon F3
The propellant in those cans leaves a faint residue that etches into the plastic over a few weeks, and I found out the hard way when a guy in Portland brought back his F3 complaining about hazy framing lines. A $4 bulb blower takes 30 extra seconds and does the job with zero risk, so why are people still reaching for the can?
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john_cooper1mo ago
Wait, so the residue actually etches into the plastic itself and not just sits on top? That's way worse than I thought. How long before you started seeing it, was it days or did it take the full few weeks?
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