- FOCAL LENGTH SIMULATOR
The focal length changes the angle of view in an image. The longer the focal length, the smaller the angle of view and the greater the magnification.
- SIGMA LENS TECHNOLOGY
Learn about the state of the art technology put into Sigma lenses to ensure high quality images.
- LENS TELECONVERTER COMPATABILITY CHART
Get more reach with what you have. Check the compatibility of your lens with the teleconverter chart.
- LENS CHART
Need more information on a lens? Cross reference all the specs using the lens chart.
- DC LENS COMPATABILITY CHART
Check the compatibility of DC (APS-C sized sensors) lenses.
- LENS CHART FOR RECENTLY DISCONTINUED LENSES
Get all the information you need on discontinued lenses.
- MTF CHART GUIDE
See how a lens performed using the Modulation Transfer Function (MTF) Chart Guide. The MTF is just one criterion used to evaluate lens performance.