Get Zeiss Milvus 25mm f/1.4 at B&H Photo.
The Zeiss Otus 28mm f/1.4 APO-Distagon makes an outstanding lens for focus stacking.
The highly corrected design of the Otus 28/1.4 along with a low level of focus breathing (change of magnification when focusing at different distances) all making stacking unusually easy
Includes images up to full camera resolution.
Temperatures heading out for a late day photo shoot were already around 35°F, dropping instantly by 5°F as the sun dips below the nearby mountaintops and the wind picks up. Multiple layers might not be stylish, but they sure help. Fingers are the worst issue for me (fingertips), making fingerless gloves pretty much useless—I just get cold fingertips that quickly become painful.