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by John
(Cape coral, FL)
"I own the original Canon 100-400 4.5-5.6 L Lens but I am having focusing problems with that attached to my new Canon 90D camera.
Can my original 100-400 zoom (mentioned above) be modified or upgraded to the newest version of that lens and if so ...how much would it cost?"
Hi John
You cannot modify the Canon 100-400mm IS L to convert it to a Canon-400mm IS L II. You can see by the diagram below, comparing the version I that you have and the more recently released version II, that they have a completely different set of lens elements, arranged in a totally different design.
Comments for Upgrading From The Canon 100-400
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Bruce Lovelace is the publisher of Canon Camera Geek. Read more about him on the About Page. He also publishes how to articles and camera gear reviews at the Photography Tips website.
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