Print Page - Setting MaxApertureValue for Large Aperture (< 1) Manual Lenses

Title: Setting MaxApertureValue for Large Aperture (< 1) Manual Lenses
Post by: sam on June 30, 2016, 04:47:40 AM

I have a Canon FD 50mm f/1.2 lens with a Metabones focal reducer which gives about an one stop more light.

So, I'd like to set this value to 0.8 for this combo.

Code Select


exiftool -MaxApertureValue=0.8 $image
Warning: Must be a positive number for ExifIFD:MaxApertureValue

Title: Re: Setting MaxApertureValue for Large Aperture (< 1) Manual Lenses
Post by: Hayo Baan on June 30, 2016, 06:31:51 AM

There is a problem with the EXIF specification at this point; it simply does not allow for aperture values > 1. This is a grave oversight as not only do lenses with apertures > 1 really exist, they can also be fabricated using converters like you do.

Other than writing the info into the relevant xmp tags, I do not see a solution for you :(

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ExifTool => Newbies => Topic started by: sam on June 30, 2016, 04:47:40 AM