Parallax

[aamaci]

Just musing... I have often wondered why it is that the watch hand which requires the greatest level of accuracy for timing events is the central seconds hand of a chronograph, for instance, yet it is always the last hand on the pinion column (if that is the correct term), and so furthest away from the watch face. This means that it is the hand which is most open to visual inaccuracy due to parallax error. Is that just because it's how it has to be as a result of how watches were traditionally made? Are there any that have the seconds hand closest to the watch face? As I say...Just musing

Thanks

A

[MartynJC (UK)]

I can't answer most of your musings, but can add inaccuracies due to human error of perhaps 0.3s would probably outweigh parallax errors.

I did find this section in def stan 66-30/1

https://www.h-spot.net/watches/mod/e...eters_1981.pdf

[sweets]

I would also add that in older styles of chrono, the chrono-secomd hand was usually the longest, and was curved down towards the dial to remove a degree of parallax

[aamaci]

Thanks chaps! The tip curving down towards the face, certainly answers my parallax query.

A

[Ascalon]

Interesting point when you consider the edge distortions associated with old hesalite crystals.