Posted in Canon SLR forum first

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Marek M Contributing Member • Posts: 634
Posted in Canon SLR forum first

It may be that it is not interesting, it may be something else.

BUt, does anyone know the reason for the below:

Hello,

My Canon 17-40mm f4 lens shows a focal length of 19mm in Lightroom and Zoombrowser, on pictures that were taken at 17mm.

I re-tested it, on both 6D and 6D MkII and it is the same.

Lens is set to 17 mm but EXIF shows 19mm.

Does anyone know what would be an explanation?

I am asking out of simple curiosity, it does not present a problem in any other way.

By the way, when picture is taken at 40mm, it shows 40mm in EXIF.

Canon EOS 6D
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