Excerpt: Sigma 19mm F/2.8 Micro Four Thirds Lens This moderate wide angle lens is currently available to fit both Micro Four Thirds and Sony NEX cameras and costs around £170. It sports a bright f/2.8 aperture and a newly developed linear focus motor.
Excerpt: Sigma 19mm f/2.8 EX DN is the second lens in the new series of lenses for mirrorless cameras that Sigma has introduced in early 2012. The lens currently is available for both NEX as well as mFT cameras and retails at ~$199 (as of April 2012). Along with its 30/2.8 EX DN cousin, the 19mm lens targets entry level market and fills in a niche between Sony's UWA 16/2.8 and 24/1.8 lenses.
Excerpt: A couple of upcoming lenses that I’m looking forward to trying out are the Sigma 19mm and 30mm f/2.8 models for NEX and Micro Four Thirds cameras. I’m particularly looking forward to getting a production model of the 30mm f/2.8 lens in the NEX mount since it works out to a 45mm-equivalent (60mm-equivalent for Micro Four Thirds models).
Excerpt: This lens is available in either a micro four thirds mount for Olympus and Panasonic cameras or an E mount for the Sony NEX range. On MTF cameras the film equivalent focal length is 38mm and on the Sonys, with the larger sensor, it is 28.5. There is no internal image stabilisation so it is best suited to Olympus cameras with their in-body IS. Construction quality is good and the auto-focus linear motor is very fast, accurate and quiet.
Sigma AF 19mm f/2.8 EX DN (Sony E mount) - Review / Test Report
9 February 2013
Conclusion: The Sigma AF 19mm f/2.8 EX DN shares a couple of characteristics with its sister lens, the Sigma AF 30mm f/2.8 EX DN, but it doesn't reach the same level of performance. The center quality is absolutely great for sure but the outer image regions are soft at f/2.8 and reach only good levels at medium aperture settings. The pronounced lateral CAs don't help either in terms of subjective quality perception.
Excerpt: In January 2012 the Sigma company presented two new lenses designed for mirrorless cameras - the Sigma 19 mm f/2.8 EX DN and the Sigma 30 mm f/2.8 EX DN. To tell you the truth that launch took me by surprise. In the case of the Micro 4/3 system a small sensor allows to construct physically small and fast lenses so quite significant dimensions of the Sigma with the aperture of f/2.8 don’t fit here at all.
Cons: significant vignetting on the APS-C sensor,, noticeable coma,, spherical aberration not corrected properly,, work against bright light could have been better.
Excerpt: This moderate wide angle lens is currently available to fit both Micro Four Thirds and Sony NEX cameras and costs around £170. It sports a bright f/2.8 aperture and a newly developed linear focus motor.
Pros: Excellent sharpness from maximum aperture, Compact size, Lightweight, Decent build quality, Quick autofocus
Cons: Slightly high levels of barrel distortion for a prime lens
Sigma 19 mm F2,8 EX DN a Sigma 30 mm F2,8 EX DN (test)
17 October 2012
Conclusion: Sigma letos představila dva pevné objektivy – modely Sigma 19 mm F2,8 EX DN a Sigma 30 mm F2,8 EX DN – vyráběné ve verzích jak pro bajonet micro 4/3 i Sony E (NEX). My jsme měli možnost otestovat kvalitu obou objektivů na těle Olympusu OM-D E-M5, po přepočtu jsme tak pracovali s ohnisky 38 mm (v případě Sigmy 19 mm F2,8 EX DN) a 60 mm (Sigma 30 mm F2,8 EX DN).