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Old Apr 14, 2005, 10:06 PM   #1
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I purchased the Canon 100-400mm, f4.5-5.6 IS lens about a year ago. At the time of purchase the lens was used on a Canon 10D with excellent results, very sharp pics. Recently, I've purchased a Canon 20D and have had problems with sharpness using this lens.Questions; "A.Is this lens not compatible with the 20D? B. Can a lens like this need calibration and some type of maintenance?" Any help would be appreciated.

Thanks,

Mike


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Old Apr 15, 2005, 3:31 AM   #2
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As I've mentioned in other posts, get your camera calibrated from a Canon Authorised Service Centre. I took mine in on Saturday just gone and they said it was a mile out.

Will post some results later next week as I am at a bike race on Sunday but won't get back til Monday lunch!

Hoping for some better shots!

Carl.
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Old Apr 18, 2005, 7:23 AM   #3
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Hi,

I was able to go trackside at weekend and never used my 100-400, only used my 70-200 so am unable to show you any photos with the lens in question.

Sorry!
Carl.
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Old Apr 20, 2005, 10:10 PM   #4
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Carl,

Thanks so much for your input.My 100-400 lens has been sentto Canon for calibrationper your recommendation. Hopefully, calibration is all that isrequired.

Thank You,

Mike




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Old Apr 22, 2005, 6:32 AM   #5
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I am seeing posts like this all over the popular forums and, frankly, I find it disturbing. Why are so many lenses needing to be sent back to Canon for recalibration?

Is it an issue where the lens has just adjusted itself to be out of wack or is this a compatibilty issue with the new camera (20D). If its the latter, then I have to laugh at everyone who is afraid to buy a 3rd party lens from Sigma or Tamron because of future compatibility problems like the recent "rechipping" issues.
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