Get Sigma 85mm f/1.4 DG HSM Art and Sigma DG HSM Art lenses at B&H Photo.
This aperture series at f/1.4 and f/2 and f/2.8 shows how well the Sigma 85mm f/1.4 DG HSM Art captures night scenes at distance, including stars and very fine details of rock and snow in the mountain peaks.
Sigma 85mm f/1.4 DG HSM Art Aperture Series: Peaks by Moonlight
Images up to 28 megapixels with large crops, all at f/1.4 and f/2 and f/2.8.
Lens name incorrect due to faulty EXIF info; it should read Sigma 85mm f/1.4 DG HSM Art
Peaks of Lee Vining Canyon
f2 @ 56.0 sec, ISO 64; 2016-11-12 20:54:36[low-res image for bot]
NIKON D810 + Zeiss Milvus 85mm f/1.4 Planar
(generic "85.0 mm f/1.4" for Sigma, Nikon and Zeiss lenses!).