Rotating bezel on my watch a tachymeter?
Question: On my beware of the rotation of the telescope outside and I heard that it is used as a tachometer. I do not be aware if this is true and if it is How can I use? I searched online and I do not understand how my shows can be used to make these calculations ...
Answer: Update on guard for the photo does not have a tachometer. The dial bezel is familiar as a countdown. You turn the knob to the desired add minutes now, and when the minute comes to embrace 0 (12) position, the time is up.










