I have a canon 70d and I am trying to import raw images into Lightroom 4. Is there an easy fix to allow me to do this?
No "fix" as such - Lightroom 4 does not, and will never, support 70D files.
Your two choices are to upgrade to Lr 5, or convert your 70D files to DNG using the Adobe DNG Converter - Lr 4 will read those.
Re: RAW support for Canon EOS 70D in Lightroom 4.
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