Author Topic: EXIF Editing - Focal length 35mm equivalent  (Read 368 times)

Offline Michael Coffey

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EXIF Editing - Focal length 35mm equivalent
« on: December 27, 2020, 11:33:34 AM »
Firstly seasonal greetings, and here’s hoping for a better 2021.

I have a Fujifilm X100F whose focal length of lens is reported correctly but 35mm equivalent is not. Please see screenshot below.

I have read mklass’ post EXIF editing from April 1 2020 and Dub’s contribution makes me think that a Code Replacement file might rectify the issue.

I have read mklass’ post "Ability to edit lens type" and Kirk’s response makes me think PM is unlikely to change EXIF data besides modifying GPS coordinates or capture time.

The X100F camera has an APS-C sized sensor so I do not see where the issue lies in PM reading the files. Can someone please set me right on this?

Michael
« Last Edit: December 29, 2020, 01:52:26 AM by Michael Coffey »

Offline dennis

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Re: EXIF Editing - Focal length 35mm equivalent
« Reply #1 on: January 04, 2021, 03:58:35 PM »
Michael,

It's hard to say what the issue is without having an actual file to examine, but it may be that you mounted a lens that the camera doesn't "understand" fully, like whether the lens was made for APS-C or not.  If the lens is designed for full-frame (looks like a zoom with 23mm in the range), then the camera may just call it as the 35mm equivalent being the same as what the camera reports.  Normally a camera will write two Exif tags, one with focal length and another with the 35mm equivalent (which might be different or not).  But the camera could only write one tag.  I would need a sample file along with a description of the lens that was mounted (make and model).

HTH...

--dennis

Offline Michael Coffey

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Re: EXIF Editing - Focal length 35mm equivalent
« Reply #2 on: January 08, 2021, 03:33:37 AM »
Hello Dennis, the camera is a Fujifilm X-100F, an APSC camera with a built-in 23mm lens. I can see that PhotoMechanic is not recognising this.

If PM6 could give the correct 35mm equivalent FOV value that would be best. I do not mind changing this data manually if it is even possible in PM6.

I attach three files below - raf, xmp and jpeg files.

Thanks, and have a different, and I hope better year in 2021 than the last.