My Astronomy Tutorials

Content:

Gimp:

How to start with Gimp for editing 32 bit floating point astrophotos:

Siril:

Siril for pre processing of astrophotos:

AstroImageJ:

Do you know about this interesting software? Tutorial and my own macros to batch load Canon CR2 raw files.

How to transform an optical distorted image to a linear image:

An attempt from me to create align and Drizzle functions to AstroImageJ, long time project!

How to make a synthetic flat frame with AstroImgeJ:

Download page for my own macros and plugin:

Fitswork:

Fitswork, a free very competitive image processing tool

Auto guiding:

How to setup EQMOD and PHD2 (Windows):

EQMOD and PHD2:
Mount polar drift align and auto guide calibration (Windows ASCOM):

Adjusting main and guide camera angle:

How to setup an off-axis adapter:

Off axis, or relative auto guiding on comets, is it possibly? Yes!

Auroras:

My setup of equipment for photographing auroras:

First published: 2024

Meteor Showers:

My setup of equipment for photographing meteor showers:

First published: 2024

Short tutorial about how to take photographs of meteor showers.

First published: 2017

When is there no disturbing Moon light ?

First published: 2018

Comet:

How I plan when there is a comet going on.

Where to find these exciting comets?

Camera / lens:

Here I do a simple check how well my camera's pixel size match my optics.

A clean camera sensor is very important when doing astrophotography. My idea how to clean the sensor from dust and dry stains.

Warning:
The interior of the camera and its sensor is very fragile and sensitive, you can destroy the camera by doing this ! leave it to a professional instead.

Canon 6D / Nikon D800 data transfer speed:

Data base:
Of Canon lenses focus behavior when remote controlled by APT.

Remote control of Canon camera from a smart phone.

Shall I use many short exposures or few long exposures?

How to test that the bayering pattern is correct:

ISO DSLR, what's going on inside the camera?

How to find a DSLR's multipliers for RGB values with DCRaw:

How to find a cameras time efficiency, a simple simulation:

Simulation of Atik 16200, Canon EOS 6D and ASI 1600.

Calibration:

An illustration why there are so important to do dark and flat calibration.

Dark calibration is important, especially the temperature should match between light and dark images. This is a tips for DSLR cameras with temperature sensors, i.e Canon EOS.

How to use a LCD-monitor to make flat-images for calibration

Dithering as a replacement for dark calibration

Others:

KSTARS and Ekos, Object & Sequence Selection:

How to rotate raw-files, how Exiftool can be used to rotate Canon .cr2 raw files:

Astroserver CPU load:

My friend Pehr Sällström presentation:

How to find photon flow from objects:

Photon collecting efficiency

How a boring time consuming drift align process will be very easy.

Tutorial how to do a time lapse astronomy video

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