Collimating a Classic Cassegrain telescope – or any telescope with more than one curved mirror – is not easy. Catalin from CFF Telescopes collimated this 400mm f/20 with an artificial star, a beam splitter and an optically flat mirror.
ZWO SeeStar smart telescopes have become very popular. Their ability to be run in equatorial mode has improved their abilities considerably but putting them in EQ mode is difficult. We put together a small kit of parts you will need to do it without encountering problems.
Macrophotography with a WeMacro Rail provides the depth of focus normal macro lenses can’t achieve. But managing lighting is still a difficult process, especially in such a cramped area. This article shows the effect of a couple of gadgets that help you see while posing your subject and diffuse harsh lighting during the exposure run.
Eclipses have been seen as an omen by nearly every civilization. Being able accurately predict an eclipse would give a leader immense persuasive power. Ancient astrologers noticed that solar eclipses followed a pattern. Get it right and you’re in for a promotion. Get it wrong and things might not be so good.