Which accessory do I need?

Depending on the purpose you are using your binoculars or a spotting scope for, you would need different accessories. For long observations with heavy optics instruments with a big magnification, you would use a tripod. with a great zoom comes a bigger weight and a difficulty to obtain a clear and sharp image. If you want to take pictures with your spotting scope, you would need a camera adapter. For more comfortable use and protection of your binoculars, buy a protection bag or a harness to put them around your neck during demanding mountain hikes.