The annual glove discussion....
Having worked in an outdoor shop, and doing probably 60% of my photography while climbing or sailing I'd go for:
A thin(ish) pair of "soft shell" gloves from a good outdoor shop. You will get wind protection, some water resistance, grip and hopefully enough insulation unless you are shooting in properly cold place. Mine:
The amount you can do with the camera depends a lot more on how well the gloves fit than the thickness. I can open an old style silver foil kit-kat in my winter mountaineering gloves, and they are good down to about -15.
And yes, I really am taking the pictures wearing the other one, including the fleece liner...
You need to try lots of pairs, and buy based on the fit not the style. Takes your camera, or something similar (phone?) with you and try using it.
When it's really cold I have a pair of big gore-tex, fleece lined, mittens that go over everything, so I can add some protection when I'm not shooting.
The already mentioned RAF white leather gloves are also great, but not really for keeping you warm. I tend to use them in the summer when your hands get sweaty and you loose grip. You need to buy them a bit small, and them treat them with a leather cream and work them to fit.