One of the two new lenses Sigma will announce next week for the CP+ show will be a 50-100mm f/1.8 DC HSM Art designed for APS-C DSLR cameras (Nikon DX). Here are the details:

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
Release Date April 22

18-35 + 50-100 i nic więcej mi nie trzeba...