Sigma 50-100mm F1.8 A is an Auto Focus (AF) Telephoto Zoom
lens with APS-C / DX max sensor coverage and it is designed to be used with Sigma SA mount cameras.
Sigma Art Lenses in Sigma SA Mount
Check the link below to compare specs of the latest cameras in this series side by side:
Sigma 50-100mm F1.8 A is compatible with cameras that have Sigma SA
lens mount. Some of the latest released cameras with Sigma SA lens mount are Sigma SD1 Merrill
, Sigma SD1
Max sensor coverage of Sigma 50-100mm F1.8 A is APS-C / DX
Sigma 50-100mm F1.8 A has a focal range of 50-100mm and 2.0X zoom ratio.
Optical Image Stabilization
Sigma 50-100mm F1.8 A doesn't have an optical image stabilization system so the only option to stabilize the image taken with this lens is to mount on a camera body with IBIS (sensor based In-body image stabilization).
Sigma 50-100mm F1.8 A is available in Black color.
Sigma 50-100mm F1.8 A features Rotary (internal)
zoom method where the length of the lens doesn't change while you are zooming in or out. Even though this design has a size disadvantage in general compare to extending designs, it has the benefits of better sealing against dust and moisture, no zoom creep and no weight balance shift while zooming.
Maximum Magnification Ratio
Sigma 50-100mm F1.8 A has a Max Magnification Ratio of 0.15x
and has a minimum focusing distance of 0.95m
Sigma 50-100mm F1.8 A is a fixed aperture lens with a constant max aperture of f1.8 from 50mm all the way to the 100mm .
Sigma 50-100mm F1.8 A's optical formula consists of 21 elements in 15 groups. Following special elements are used in this design:
- Three FLD
- one SLD
- one HRI elements