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(San Antonio, Texas, USA)
Camera: Canon 5D Mark III
Lens: EF-S 10-18mm IS Macro
Is there a Canon mount converter that will safely turn my EF-S lens to an EF lens in order to fit my 5DM3?
Thanks for asking about an EF-S to EF lens converter for Canon. No, you cannot make a smaller EF-S 10-18mm lens fit onto a larger full frame 5D Mark III. The image circle on the 10-18mm lens is too small to project light to cover the entire full frame sensor of the 5D M3.
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