Sorry Pål, this must be crap. USM selling point is less couplings,
less friction than traditional gear mechanisms. If theirs lasts 20
hours, than how many minutes should survive ours? :o/
Servus, Alin
Pål wrote:
PJ According to Canon the ultrasonic motors used in their lenses
- Original Message -
From: Alin Flaider [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, May 01, 2001 1:24 PM
Subject: Re: Ultrasonic motors crap?
Sorry Pål, this must be crap. USM selling point is less couplings,
less friction than traditional gear mechanisms
Todd Stanley wrote:
Not as bad as it sounds, that's 72,000 seconds. Say it takes on average 1
sec to focus (pretty conservatice I say), that's 72,000 focusing's, or
2,000 rolls of 36 exposure film - that means it will probably last longer
than those cheap plastic things those lenses
According to Canon the ultrasonic motors used in their lenses have a lifespan of less
than 20 hours due to friction wear and tear. This according to Nikkei Industrial
daily. (I read it on photo.net)
Pål
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Not as bad as it sounds, that's 72,000 seconds. Say it takes on average 1
sec to focus (pretty conservatice I say), that's 72,000 focusing's, or
2,000 rolls of 36 exposure film - that means it will probably last longer
than those cheap plastic things those lenses attach to :)
Todd
At 01:47 AM
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