I wanted a lens with high light intensity and good imaging performance. Since I had a good experience with a macro lens from Tamron and due to the positive user opinions I ordered the part. Positives: - On my Pentax K-5, the AF is very accurate - Focus very well, going at full aperture already happening - In daylight no color distortion - Hardly distortions - The intensity is impressive, especially when shooting at night
The color distortion in artificial light I need to consider in more detail.
Definitely a recommendation and future proof as full frame suitable.