Glanz Hot-Shoe 3 Way Spirit Level

Finally, a level that actually sits flush in the hot-shoe mount without slipping. The three bubble vials make it dead simple to get both the horizon and vertical lines straight for panos.

Took this out for a long-exposure shoot and the three spirit levels made leveling my tripod head feel almost automatic, even in fading light. It's so light I forgot it was sitting in the hot-shoe, but it did its job without a single wonky frame.

Finally, no more guessing if my tripod head is level before a long exposure. That third axis level is surprisingly handy for correcting subtle tilts I never noticed before.