EXIF info

I have had compatibility issues in the past with some Sigma lenses and Canon DSLRs.

Canon, and I suspect the other camera makers, do not publish details of the communication protocol between their lenses and the camera. Third-party manufacturers therefore have to make their best guess, which is not always totally correct. For example, I have some older Sigma lenses which will work fine on a Canon Film SLR but not on Digital. Usually, the incompatibility prevents the lens working at anything but full aperture. Maybe the EXIF error is something similar.   

I thought I would resurrect this topic since the problem of incorrect display of the EXIF data on images uploaded to PoE still seems to be just the same as it always was. I have checked a few of my recent uploads, and found that whilst the ISO setting and shutter speed are reported correctly, the aperture is always wrong. Looking at my original images on any other photo browser shows that there is no fault with the EXIF data itself, so it seems to be a problem of how the PoE software interprets the data.

Although this is a minor gripe, it can be quite educational knowing what aperture setting has been used when looking at other people's images.