Exquisitely Detailed Sigma Zoom Lens Review of the 18-35mm and 50-100mm T2
Alfonso Parra has an outstanding review of two of the Sigma zoom lenses designed with the cinematographer in mind – the 18-35mm and the 50-100mm T2 lenses.
Parra takes a look at the Sigma’s resolution, color, and bokeh using a Red Weapon 8K camera. The footage for the tests (see below) was shot in 4KHD at 8:1 25fps. In addition to frequency charts they shot outdoors to get more of a real-world impression while evaluating.
Alfonso Parra shot the charts and analyzed via Imatest, ImagJ, and Color Inspector. For light sources they used a variety all adjusted with the Sekonic c700 and Sekonic I-88.
The overall quality of both zooms is decent but Parra agrees that the 18-35 is best when considering the resolution and apparent lack of chromatic aberration. Both lenses are classified as low contrast and warm.
The full 22 page review is available in PDF format so if you’re at all interested in glass give it a read – it is awesomely in depth.