You do need the proper filter to observe the Sun.It just feels more like a real sextant image with the eyepiece. You don't need the eyepiece thing described below to use CamSextant app.So - if you want to practice celestial navigation - get yourself a marine sextant. In a rocking boat, the gyro response is even worse. While the phone gyro is a nice piece of equipment, it is not nearly as precise as a marine sextant.It is available on the Apple App Store ( links in the end of this text ) Instead of a separate eyepiece, I used the phone camera as a pointer device for observations.Īn special app - also called CamSextant - was developed to work with it, capturing altitude readings. The device described here, named CamSextant, is also an iphone sextant and is even easier to build. That device combined a telescope viewfinder with the phone and uses the phone gyro to read the altitudes. Recently I published the iphone Sextant project ( iSextant ).
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