Makina 67 is an ideal solution for cold weather because it's not reliant on electronics and it folds very well to fit into insulation. No other modern medium format camera without electronics can fold down as thin to fit comfortably under a coat or in a pouch when you're hiking in cold weather.
I use mine for winter mountaineering in extreme conditions and it has't failed on me once. I leave it in an insulated pouch and only take it out for photos when it drops below freezing.
The only downsides are as follows:
- The bellows does not work well in rain or high wind (when ice is blowing at you) due to possible damage or trapping moisture in the camera
- It's incredibly slippery without a grip (improved slightly with the later version)
- The aperture and shutter speed selection can be tough to use with thick gloves, as with storing the bellows
Both of these were taken at around minus 15 celcius with winds so strong I could barely stand up:
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