Neat way to measure your max pupil dilatation

[vlaiv]

Just wanted to share - it is very nice / simple way to do it, but it does require a bit of specialist gear.

Have planetary camera that is sensitive in NIR and all sky lens or similar?

Get NIR light source, lock yourself into dark room, wait a bit and take an image:

Maybe hold ruler next to your eye so you can read off scale.

[RobertI]

Nice one Vlaiv. It would be interesting to compare the results using this method with the 'allen key' method as described in Astronomy Hacks. Not tried it myself yet but keep meaning to.