The Nikon MC-36
Though who have shot with me know I’m not a huge cable release fan, in fact, I never use them. Almost never. When Do I use them? The only time is doing star trails when I need to use the timer of the MC-36. If that’s the case, why is the MC-36 and MC-DC2 (attaches to GP-1) in my camera bag all the time? Because you just never know when you might need a cable release. While I rarely use them, they are always with me just in case.