I bought a pair of North Face gloves, and my wife preferred Berghaus, for our northern lights photography trips to northern Norway. Both makes coped well with the very cold nights while retaining enough dexterity to operate DSLRs. Alternatively, and I don’t know if they’re still available, have a look for motorcycle gloves where the fingers are only divided into two groups plus a thumb. I can’t remember the make now, but they worked quite well for me over long (60 mile each way) commutes in winter.
Cheers, Bob
edit: I had the Rukka gloves -
Rukka GTX 3 Chamb 2 finger waterproof Gore-Tex motorcycle winter glove , but there are also the Frank Thomas DriVis Claw gloves