SMC Pentax-M 40-80mm f2.8-4 brand_Walz you can toss the holder

you can toss the holder into a warm pocket and minimize the effect of extreme cold weather on the function of your battery-powered camera

image quality is excellent

and two adjustable arms with standard 1/4" threads on the ends (with a pair of cold shoes attached)

and fifth battery compartment for faster recycling

SMC Pentax-M 40-80mm f2.8-4 brand_Walz you can toss the holderThe SMC Pentax M 40 80mm f2. 8 4 is a "standard" zoom lens with a slightly unusual range of focal lengths and a not too bad "macro" mode that provides up to 1: 4 magnification. In very good cosmetic condition, with light paint wear, most notably at the front rim.