One issue is that there is no standardization as to where cameras, software, etc, put the EXIF info. Exif viewer is probably the best there is at finding info wherever it may be. It may not be under the usual Aperture field but likely is somewhere in file. But every time I want to tweak our addon to look in one additional place where some camera or software puts info, I have to pay for developer time, and there doesn't seem to be any end to it. Fwiw, our XF2 addon can do more than our XF1 addon could do.Checked both pics above, @Brownie and @Carbonman , Exif Viewer show no field for Aperture in any of the pictures.
Can it be that Flickr has removed it?