Summary:
Positives:
- Quiet and fast autofocus drive
- Sharp imaging
- Sealed against water spray (I do not have tested), seals are visible
- Price compared to comparable Zeiss optics
Neutral:
- Weight and size, you have to like
- The lens ID of my copy is equal to that of Zeiss 24-70 may be disadvantageous when the camera internal lens correction is active, which does not fit for Tamron yes
- To the Alpha 77 (APS-C) no wide angle, as full-frame lens, but I did not previously clear
Negatives:
- Nothing