Agisoft Metashape

Agisoft Metashape => Bug Reports => Topic started by: David Cockey on February 18, 2014, 06:33:07 AM

Title: Aperture Value, not F-stop in Show Info... for photos
Post by: David Cockey on February 18, 2014, 06:33:07 AM

The number in the Aperture line of the Show Info for photos is the Aperture Value, not the F-stop number, even though the number is preceded by "F/" which implies it is the F-stop number. A photo taken at F/8 is has an Aperture of F/6 shown, and a photo taken at F/11 has an Aperture of F/7 shown. This is not a major problem but it is confusing when looking in PhotoScan to see what F-stop was used for a photo.

"Aperture Value" = log("F-stop") / log(sqrt2)
"F-stop = (sqrt 2) ^ "Aperture Value"

My understanding (perhaps incorrect) is the raw EXIF data contains the Aperture Value rather than F-stop. Most software converts it to the corresponding F-stop value before reporting.
   

Title: Re: Aperture Value, not F-stop in Show Info... for photos
Post by: Alexey Pasumansky on March 09, 2014, 02:19:10 AM

Hello David,
 
Thank you for your remark, we have corrected Photo Info tab in the new release (build 1832).