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Canon 8-64mm Breathing(?)


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#1 Steve Zimmerman

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Posted 02 April 2013 - 05:30 PM

I was checking out a Canon 8-64 zoom for Super 16mm today.  I read that these particular lenses do not breathe.  This one seems to do it A LOT. Enough to be annoying while filming.

I'd say a 10mm shift or so.  Is this easily repairable with a good CLA? 

 

Does that amount seem normal for this lens?

 

Is this inherent to the mechanics now because of it's age?

 

 

Thanks so much.

 

Steve

 

 


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#2 Steve Zimmerman

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Posted 02 April 2013 - 09:24 PM

http://www.reduser.n...e-breathing-fix

 

I found this thread.  I Think it answers my question.  ;)


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#3 Dom Jaeger

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Posted 02 April 2013 - 11:12 PM

Curious to know how that thread answered your question! 

 

For an 8x zoom the 8-64 breathes very little. A 10mm shift doesn't really make sense because the variation from 6-16 is huge while 54-64 is much smaller, but I don't think it should breathe even as much as 54-64. If you rack all the way from close focus to infinity you will of course notice a shift, but compared to other zooms it's pretty minimal.

 

After 10 years of working on zooms I've never come across a mechanical fault that increases breathing, but then again I seem to come up against new and interesting lens faults all the time, so who knows! 


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