Peter's problem-solvers

Whether it's annoying colour fringes, upside-down images, or filters that like to do their own thing, you're not alone with these problems.

Sometimes it's physical laws like the atmospheric dispersion of light, sometimes it’s mundane difficulties like juggling expensive filters in the dark. In any case, they stand between us and our observing enjoyment. It's good that there are proven solutions.

Colour fringing on low-lying planets

Hurrah, it’s planet season! Unfortunately, your expensive apo reveals psychedelic colour fringing. The atmosphere is to blame – but an ADC offers a remedy.

Everything looks right?

Reversed, upside down, or both together - how would you prefer it? Fortunately, there is "right way round".

Changing filters quickly

Observing the Moon, planets, and deep sky all benefit from the use of filters. Now all we need to do is come up with an easier way of changing them.