I recently found some issues on my Tamron 24-70mm f2.8 G2 (A032) lens for Canon.
The first issue is about the focal length in the EXIF data. While the lens works well in autofocusing, I found the focal length was incorrect in the EXIF data. For example, I took the picture at 24mm, but the metadata shows 70mm. I cleaned the pin of the lens and camera body (EOS 60D) to make sure there's no bad contact, but this didn't solve the problem. I also checked this issue with my Canon 70-300mm lens on the same body. The EXIF data was correct at all focal lengths. So I suspect this is a lens problem. I contacted Tamron's service, and they told me I can solve this problem by using their Tap-in console. Does anyone have the same issue? Can that tap-in console handle my situation?
The second issue is that, in the EXIF data, I found the serial number of my lens is a bunch of zeros. I could find the serial number in the lens body and could also register it online. So I guess the lens should be authentic, but why there's no serial number in the metadata? Is this a common issue on Tamron's lenses, or just a special case?
Thanks in advance.