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Tutorials
You probably came to this web site because you are an astrophotographer or decided to try your hand at astrophotography. Here you will find some introduction to this great hobby and information about the equipment you will need.
Buying your first telescope is probably going to be your most difficult decision as an amateur astronomer. This tutorial gives a quick run down of the basic types of telescope and their strengths and weaknesses.
What is a telescope mount and how does it work? What are the types of telescope mounts and which mount should I choose for my telescope? This tutorial overviews existing mount types with their pros and cons.
With so many stars in the sky, how can we locate a star, find it again, or tell other people where it is located? This article presents several coordinate systems used by astronomers to describe positions of celestial objects.
What our universe consists of? What do you know about its structure? This article gives you a brief overview of types of astronomical objects and provides a (subjective) list of the best (or the most popular) deep-sky objects to photograph.
Guidescopes & Off axis guiders
Webcams are without doubt the cheapest option for entry into astrophotography, but they are very temperamental and do not really respond well to traditional imaging. This tutorial provides you with the basic information on the use of these cameras for astophotography.
In an RGB image, exposures through red, green, and blue filters are combined to create a color image. This works because the human eye sees color as a combination of these three primary colors. The cones in our eyes are of three types, sensitive to either red, green, or blue. As it turns out, however, humans get primarily color data from these cones, and not spatial information (detail). The spatial information comes from the rods in the eye, which are not particularly sensitive to color. This means that combining a high-resolution black-and-white image with low-resolution color images will yield a high-resolution color image, because we don't get the resolution data from the color images. Essentially an RGB image "paints" a high-res black-and-white image and none of the spatial data is lost. This article introduces an LRGB imaging technique that allows you to combine a deeper black-and-white image with a color RGB image to bring out more detail than the RGB would have alone.