ART105mm F1.4 DG HSM
- Incredible resolution and stunning contrast
- Pin sharp focus with gorgeous, smooth bokeh
- Exceptional peripheral brightness
- Dust and splash resistant structure
- Water and oil-repellent front coating
- Hyper Sonic Motor (HSM) for silent, fast autofocus
- Full-time manual focus override
- Super Multi-Layer Coating reduces flare and ghosting
- Exclusive low-dispersion glass
- Removable Arca-Swiss tripod socket
AWARDS
- Resource 2018 Best Portrait Prime Lens Sigma 105mm F1.4 DG Art Imaging
- 105mm F1.4 Art PCMag Editor Choice Award Sigma
Sony E-mount: 115.9mm x 157.5mm / 4.6 in. x 6.2 in.
SIGMA SA-mount: 115.9mm x 131.5mm / 4.6 in. x 5.2 in.
Sony E-mount: 1,720g / 60.7 oz.
SIGMA SA-mount: 1,645g / 58.0 oz.
LENS CONSTRUCTION
- FLD glass
- SLD glass
- Aspherical lens
MTF CHART
The MTF (Modulation Transfer Function) is one of the measurements for evaluating a lens' performance, and it shows how faithfully the contrast of the subject can be reproduced on the image plane. The horizontal axis shows the image height (distance from the center of the image in mm) and the vertical axis shows the contrast value (maximum value is 1).
The closer the 10 line pairs/mm curve is to 1, the higher the contrast and clarity of the lens is, and similarly, the closer the 30 line pairs/mm curve is to 1, the better the resolution and sharpness of the lens is.
*The MTF chart depicts the result at the wide-open aperture.
*For mirrorless lenses that support distortion correction, the horizontal axis shows the image height equivalent to when an L-Mount lens is attached to a Sigma L-Mount camera with distortion correction applied. (The effect of distortion correction may differ depending on the mount and camera used.)
*The spatial frequency indicates the variation on the image plane before distortion correction is performed.
Spatial Frequency
S: Sagittal Line
M: Meridional Line
10lp/mm
30lp/mm
DIFFRACTION MTF
GEOMETRICAL MTF
Hyper Sonic Motor (HSM)
The Hyper Sonic Motor (HSM) uses ultrasonic waves to drive the autofocus mechanism. It features extremely quiet operation, high torque, and excellent focusing speed.
Compatible with Lens Aberration Correction
Matching the optical characteristics of the lens, this function performs in-camera corrections of peripheral illumination, chromatic aberrations, distortion, and more, to further enhance image quality.
*Function available on supported cameras only. Available corrections or auto correction functionality may vary depending on the camera model.
*On cameras where lens aberration correction is controlled with 'ON' or 'OFF' in the camera menu, please set all aberration correction functions to 'ON' (AUTO).
Exclusive low-dispersion glass
Careful arrangement of exclusive low-dispersion glass elements gives SIGMA lenses superlative image rendition untarnished by residual chromatic aberration.
Water and oil repellent coating
Incorporates a water and oil-repellent coating that allows water to be wiped away easily and prevents oil and grease from sticking to the surface, even in challenging shooting conditions. At the same time, the maintenance of the lens surface becomes easier.
Dust and Splash Resistant Structure
This lens features a highly effective dust and splash resistant structure with special sealing at the mount connection, manual focus ring, zoom ring, and cover connection.
*Although this construction allows the lens to be used in light rain, it is not the same as being waterproof, so please prevent large amounts of water from splashing on the lens. It is often impractical to repair the internal mechanism, lens elements and electric components if they are damaged by water.
Other
- Rounded diaphragm
- Compatible with AF Assist (Sony E-mount only)
- High-precision, durable brass bayonet mount
- Designed to minimize flare and ghosting
