latest news

Custom refractors

We now offer custom built refractors with world class optics from APM in Germany. For more info please mail to: info@jtwastronomy.com

Instrumentation specialist

Thanks to the acquisition of new, large machinery we are optimising our facility towards making custom instrumentation - large telescopes, mounts, optics, etc. For more info please mail to: info@jtwastronomy.com

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Tutorials

Basics

Basics

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.


Telescope primer

Telescope

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.


Mount primer

Mount

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.


Celestial coordinates

Sky

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.


Astronomical object primer

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.


Polar alignment

Polar

Polar alignment is the procedure of aligning the rotational axis of a telescope's equatorial mount in parallel with that of the Earth to track the night sky with your telescope. This tutorial describes methods for rough (approximate) polar alignment, accurate polar alignment and precise (drift) alignment. It also provides a lits of polar alignment software for PC controlled mounts.


Autoguiders

Polar

Guiding for long exposures is challenging, yet a critical task. Astrophotography for deep space objects, associated with medium to long focal length, requires high precision accurate tracking and active guiding. Here we provide a brief overview of available guiding techniques, off-axis and on-axis guiders and guide scopes.


Webcam imaging primer

Webcam

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.


Debayering a DSLR

Webcam

Give your DSLR a new lease of life, make it into a true monochrome camera! Also useful for conventional and NIR photography


LRGB primer

lrgb_logo

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. 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. 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.