The 50mm F1.4 DG HSM is a premium 'normal' prime designed for Leica and Panasonic camera that use the L-mount. Not to be confused with the older 50mm D1.4 EX DG HSM, it's a completely new lens with a complex optical formula of 13 elements in 8 groups, and a minimum focus distance of 40cm. As part of the 'Global Vision' line it's also compatible with Sigma's USB dock and Mount Conversion Service. On APS-C / FX SLRs it acts like a 75mm short telephoto lens.
| Principal specifications | ||
|---|---|---|
| Lens type | Prime lens | |
| Max Format size | 35mm FF | |
| Focal length | 50 mm | |
| Image stabilization | No | |
| Lens mount | L-Mount | |
| Aperture | ||
| Maximum aperture | F1.4 | |
| Minimum aperture | F16 | |
| Number of diaphragm blades | 9 | |
| Optics | ||
| Elements | 13 | |
| Groups | 8 | |
| Special elements / coatings | SLD glass elements, aspheric elements | |
| Focus | ||
| Minimum focus | 0.40 m (15.75″) | |
| Maximum magnification | 0.18× | |
| Autofocus | Yes | |
| Motor type | Ring-type ultrasonic | |
| Full time manual | Yes | |
| Focus method | Internal | |
| Focus notes | Floating focus system | |
| Distance scale | Yes | |
| DoF scale | Yes | |
| Physical | ||
| Filter thread | 77 m | |
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