Four new lenses from Sigma and Tamron to be announced next week

Sigma 50-100mm f/1.8 DC HSM Art

Lens construction: 21 elements in 15 groups
Three FLD, one SLD elements, one high-refractive-index high-dispersion glass, three high refractive index SLD glass
Filter size: 82mm
Shortest focusing distance: 95cm
Maximum magnification: 1: 6.7
Total length: 170.7mm
Maximum diameter: 93.5mm
Weight: 1490g
Aperture blades: 9 (circular aperture)
New thinned ultrasonic motor
Inner focus, inner zoom
Suggested retail price in Japan: 167,400 yen (tax included) or around $1,400
Available in Canon, Nikon and Sigma mounts
Release Date April 22

Lens design: 9 elements in 7 groups (double-sided aspherical lens high refractive index and high dispersion glass)
Aperture blades: 9 (circular aperture)
Filter Size: 52mm
AF motor: stepping motor
Shortest focusing distance: 30cm
Inner focus
Total length: 73.3mm
Maximum diameter: 64.8mm
Weight: 265g
Available in Sony E and Micro Four Thirds mounts
Release Date: March 18, 2016
Suggested retail price in Japan: 51,840 yen (tax included) or around $400

Tamron SP 90mm f/2.8 Di MACRO 1: 1 VC USD (Model F017) for Canon, Nikon and Sony mounts (no VC for Sony)
Tamron SP 85mm f/1.8 Di VC USD for Nikon, Canon and Sony mounts