A Sun Finder

A few years back I posted the design of a Sun finder. With the eclipse looming it is time to highlight that post again. Aiming your telescope or camera at the Sun can be a nuisance. A problem with a really simple solution.

Sun Finder
A Sun finder mounted to a TeleVue 76mm ‘scope
The idea is simple… A pinhole that casts a small dot of light on a target. Line up the dot on the target and the Sun should be neatly in your field of view. Having used these devices many times, it really is that easy, Sun in view in seconds.

Sun Finder
A sun finder in use with the projected dot visible
My version is a custom machined part made from aluminum and plexiglass. In a crush a similar item can be made from cardboard and tape with a pair of scissors, and probably function just as well.

I would suggest light cardboard, the type used in a cereal box, and some masking tape that will peel clean off your telescope or camera. Just line up the telescope once and mark the dot of light’s position with a pen… Done.

Author: Andrew

An electrical engineer, amateur astronomer, and diver, living and working on Mauna Kea, Hawai'i.

Leave a Reply

Your email address will not be published. Required fields are marked *