Is the Sigma 17 70 A good lens?
The Sigma 17-70mm f/2.8-4 DC Macro OS Lens features a great general purpose focal length range, short minimum focus distance, HSM autofocus and OS (optical stabilization) in a well-built and very affordable lens. Its image quality is not all I hoped for.
What is a 17 70mm lens used for?
(From Sigma lens literature) Sigma Corporation is pleased to announce the launch of the new 17-70mm f/2.8-4.5 DC Macro lens. It can be used with wide variety of subjects and it is an ideal large aperture standard zoom lens for digital SLR cameras featuring an APS-C size image sensor.
What does Contemporary mean in Sigma lens?
May 4, 2022. Educate. SIGMA defines its Contemporary lenses as compact, high-quality, and affordable, to meet the needs of a wide audience of creators who simply want great images and product quality that doesn’t break the bank.
What kind of lens is the Sigma 17-50?
Manufacturer description: The Sigma 17-50mm F2.8 EX DC OS HSM is a useful large-aperture standard zoom lens designed exclusively for APS-C format digital SLRs. Covering a focal range of approximately 25-75mm, the 17-50mm features OS optical stabilization, and a HSM ultrasonic-type focus motor.
How does the Sigma 17-50mm HSM work?
The lens is equipped with Sigma’s Hyper-Sonic Motor (HSM) which provides for fast and quiet autofocusing. The lens has no provision for screw-drive autofocus. The lens focuses down to 11″ (28cm). This lens is identical to the earlier Sigma 17-50mm F2.8 EX DC OS HSM except for the removal of in-lens optical stabilization. Max. Aperture Max.
How do I override autofocus on the Sigma 17-50mm?
The Sigma 17-50mm ƒ/2.8 OS is designated as an HSM (hypersonic motor) lens, but it doesn’t share the full implementation of what we’ve come to expect from Sigma’s HSM lenses. Specifically, it doesn’t feature full-time manual override, so if you want to override autofocus results you must first disengage the autofocus.
Does the Sigma 17 50 have chromatic aberration?
Chromatic Aberration. The Sigma 17-50mm ƒ/2.8 produces CA of the magenta-green variety, noticeable in areas of high contrast, and predominantly in the extreme corners. It’s mostly significant when the lens is used wide open, though zooming in does appear to limit its presence.