TAG
gear
Two and a half millimetres of light: a phone at the telescope eyepiece
A disc of light 2.5 mm across floats above the eyepiece, and the camera has to sit inside it. The arithmetic of scale, brightness and alignment.
Three cameras, and the phone does the choosing: which lens actually works after dark
The zoom button isn't wired to a lens. What really decides which sensor shoots, why it can change its mind halfway through a run, and how to take the wheel.
The streetlight changed colour: light pollution filters on a phone
The glass that cut the sodium lines arrives too late: LEDs light up the whole spectrum, and in front of a phone's wide angle a filter works crooked.
The minimal gear you need to photograph the sky with your phone
Tripod, clamp and little else: what you actually need to photograph the sky with a phone, what costs nothing, and what can stay in the cart.
