My Sleep System for Camping out in -30 Degree Temperatures to Get the Shot

I’m currently testing the new Sigma 105mm f/1.4 ART lens for a full review. One of the things I wanted to try and get was some wildlife images with the incredibly shallow depth of field that this lens is becoming famous for. That’s quite a tall order because 105mm is not all that long of a focal length on a full frame camera! This week I drove a few hundred kilometres East into part of the Yukon that I haven’t had much chance to explore before. We haven’t had snow in a couple of weeks and this meant some of