We have Sigma's press release below - The 50-100 f/1.8 at $1099 is an interesting lens, certainly one of the more expensive APS-C lenses but still way below the cost of something like the 70-200 f/2.8 and likely providing better performance on an APS-C camera. The 30mm f/1.4 looks really nice for micro 4/3 as a portrait lens - you have roughly a 2x crop with micro 4/3 which makes this a fast 60mm lens for just $339! Sigma Expands Its Global Vision Lens Line With Two New High-Performance Lenses:50-100mm F1.8 DC HSM Art and 30mm F1.4 DC DN Contemporary50-100mm is first constant aperture F1.8 telephoto zoom; 30mm represents first affordable F1.4 high-performance lens for mirrorless camerasKANAGAWA, JAPAN – February 23, 2016 – Sigma Corporation of America, a leading DSLR lens, camera, flash and accessories manufacturer, today announced the addition of two high-performance APS-C format lenses to the Sigma Global Vision product line: Sigma 50-100mm F1.8 DC HSM Art Lens and the Sigma 30mm F1.4 DC DN Contemporary Lens.“Sigma’s aim is to provide high-performance lens options that lead with innovation and break new boundaries for every photographic scenario our customers can dream up,” states Mark Amir-Hamzeh, president of Sigma Corporation of America. “These new lenses build on Global Vision’s great IQ technology and reflect this goal, delivering immense value, quality and performance that the Sigma brand is known for.”Sigma 50-100mm F1.8 DC HSM ArtBuilding on the groundbreaking Sigma Global Vision 18-35mm F1.8 DC HSM Art Lens, the new Sigma 50-100 F1.8 (75-150mm on 35mm format) mid-range zoom lens embodies the same engineering prowess to deliver outstanding prime lens-like results. Factoring in the APS-C image circle of 1.5x, the 50-100mm F1.8 covers three popular short tele prime focal lengths: 85mm, 105mm and 135mm. Like the 18-35mm F1.8, the new 50-100mm F1.8 maintains a constant F1.8 aperture yielding exceptional brightness and resolution throughout the zoom, while simultaneously maintaining focus as the lens is zoomed, a feature videographers will greatly appreciate.Sigma Art Line Image Technology Innovation
- Features three FLD (F Low Dispersion) glass elements, one SLD (Special Low Dispersion) glass element, and one high-refractive index, high-dispersion glass element to minimize aberrations.
- Redesigned and enhanced, the new Hyper Sonic Motor is 30% slimmer and provides fast and accurate AF.
- Highly durable polycarbonate diaphragm made with fluorine; blades feature carbon feather film offering exceptionally smooth operation even during continuous shooting.
Outstanding Zoom Lens Maneuverability
- Inner focusing and zoom design offer versatile shooting options
- Tripod socket for stable, comfortable operation
- Features 21 elements / 15 groups, Minimum Aperture: F16, 82mm filter thread, Minimum Focus Distance: 37.4in, Dimensions: 3.7x6.7, Weight: 52.6oz
The new Sigma 50-100mm F1.8 Art will be available in Canon, Nikon and Sigma mounts. For more information, please visit www.sigmaphoto.com/50-100mm-
- Represents first affordable F1.4 performance lens for the mirrorless market
- Sigma engineered quality within a sleek compact design
- Fast, smooth AF stepping motor designed to support video
- Features one aspherical element and one double-sided aspherical element producing imaging quality comparable to the Art line.
- Features 9 elements / 7 groups, Minimum Aperture: F16, 52mm filter thread, Minimum Focus Distance: 11.8in, Weight: 9.3oz, Dimensions: 2.6x2.9in.
The new Sigma 30mm F1.4 DC DN Contemporary Lens will be available in Sony E-Mount and Micro Four Thirds mount. For more information, please visit www.sigmaphoto.com/30mm-f1-4-