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| Re: gloves for photography in low temperatures |
no multi fingered glove will provide the required warmth for extended outdoor activity that has low exertion. this of course depends on what is considered "low" temp and wind and humidity (environment). the amount of surface area in a glove makes it a real nice heatsink. working with mitten shells or oversized insulated mittens that allow for lighter gloves (liners) to fit inside is the best option. thus you can pull your hand out and use for minimal times (environment dependent). there are heated gloves out there both chemical based and electrical that will work to a degree. but again your environment will make or break how long they are useful. another extremely important factor is your core temp or body warmth. if your core is kept properly warm for your environment your body is less likely to try to "sacrifice" your limbs to maintain core temp. what you eat and drink and your physical condition controls your internal internal furnaces efficiency.
ice climbers and such can get away with gloves for a longer time due to the fact that these gloves are warmer but have less dexterity but enough to do the task at hand. the biggest factor here though is exertion, conditioning and proper clothing for the current environment they're in.
an example of good design for more challenging conditions:
you need to take a holistic approach to staying warm.
first rule of extended COLD weather outdoor activity: cotton kills. long underwear made fom cotton absorbs perspiration and then causes evaporative heat loss and keeps you wet. your core has to work harder to keep it warmer. synthetic based or wool underwear appropriate for where you are doing your thing from Patagonia, EMS, REI, UnderArmour, Wickers and others. there are different weights. but they all as a fabric are substantially less absorbent and move moisture to the outer layers faster feeping you more comfortable and warmer.