Photographing the night sky

I've been dabbling in astrophotography lately. I'm building a "barn-door" mount and also fitting a worm-drive motor to an old equatorial telescope mount. Some follow-up build info and explanations are in progress…

The Andromeda Galaxy and an airplane (300mm f/2.8)

Betelgeuse (300mm, f/2.8)

Jupiter, for moons and a star (300mm, f/2.8)

Orion (17mm, f/4.0)

Orion Nebula (420mm, f/4.0)

Pleiades (300mm, f/2.8)