We will be closed on Monday, June 3rd and Tuesday, June 4th for purchasing supplies and health checkups, so thank you for your understanding.
Following on from yesterday, I'd like to introduce three cool devices that I'm not sure if you can use.
This is a surveying device used to measure altitude and azimuth. The lens is a little cloudy, but the view is clear and there are no problems with focusing. There are many old devices that are fun to look at, including the projector I uploaded yesterday, but I think this is the pinnacle of them all.
Surveying theodolite
Surveying theodolite
It's a device that measures the angle between two objects. Like the theodolite, it has a lot of features that you don't know how to use, and some of them are intriguing even though you don't know how to use them.
nautical sextant
nautical sextant
This is an optical instrument used in surveying and construction to measure angles from a reference point. It is in its case and still has all the accessories and instructions, but it is unclear if it is still usable.
TOPCON Theodolite
TOPCON Theodolite