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My Astronomy Tutorials



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

Gimp for astrophotography
Tutorial: Gimp for astrophotography


Siril for pre processing of astrophotos:

Siril pre processing of astrophotos
Tutorial: Siril pre processing of astrophotos


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

AstroImageJ Introduction
Comet Catalina C/2013 US10

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

AstroImageJ transform of nonlinear image to linear
During work
Comet Catalina C/2013 US10

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

AstroImageJ Align and Drizzle
During work
Comet Catalina C/2013 US10

How to make a synthetic flat frame with AstroImgeJ:

Make synthetic flat frame
Tutorial: Making synthetic flat frame

Download page for my own macros and plugin:

AstroImageJ download page
Tutorial: Download AstroImageJ related files


Fitswork, a free very competitive image processing tool

Fitswork tutorial

Auto guiding:

How to setup EQMOD and PHD2 (Windows):

EQMOD and PHD2 setup
Tutorial: Setup EQMOD and PHD2

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

Drift align and Auto guide
Tutorial: Drift align and auto guiding

Adjusting main and guide camera angle:

Adjusting camera angle
Adjusting camera angle

How to setup an off-axis adapter:

Off-axis adapter
Tutorial: Setup off-axis adapter

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

Off axis auto guiding on comets
Comet off axis autoguiding

Meteor Showers:

My setup of equipment for photographing meteor showers:

Meteor Shower equipment

First published: 2024

Equipment for meteor showers

Short tutorial about how to take photographs of meteor showers.

Photography meteor showers

First published: 2017

Perseid Meteor Showers 2015

When is there no disturbing Moon light ?

Moonlit night sky or not ?

First published: 2018

Perseid Meteor Showers 2015


How I plan when there is a comet going on.

Comet photography planning
Comet Catalina C/2013 US10

Where to find these exciting comets?

How To Find Comets
Comet Catalina C/2013 US10

Camera / lens:

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

Pixel matching
Tutorial: Pixel matching

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

Cleaning the sensor

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.

Tutorial: Cleaning the camera sensor

Canon 6D data transfer speed:

Canon 6D data transfer
Canon 6D data transfer

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

Data base: Canon lenses
Data base: Remote controlled lens's focus

Remote control of Canon camera from a smart phone.

Canon remote control
Canon remote control by smart phone

Shall I use many short exposures or few long exposures?

Many vs Few exposures
Tutorial: Many short exposures or few long eposures ?

How to test that the bayering pattern is correct:

Bayer pattern test
Tutorial:Bayer pattern test

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

3d flat image

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

DCRaw commands
RGB Multipliers

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

Camera time efficiency simulation

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

Camera time efficiency simulation


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

Dark and Flat calibration
3d flat image

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.

Dark Calibration
3d flat image

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

Flat Calibration
3d flat image

Dithering as a replacement for dark calibration



KSTARS and Ekos, Object & Sequence Selection:

Ekos Sequencer
Tutorial: Ekos Sequencer

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

Exiftool rotate .cr2 files
Tutorial: Rotate raw files

Astroserver CPU load:

Cpu load
Astroserver cpu load

My friend Pehr Sällström presentation:

Goethe's Theory of-Colour
Goethe's Theory of Colour

How to find photon flow from objects:

Photon flow
M13 object with stars

Photon collecting efficiency

Transmission and Time efficiency
Transmission optical system

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

Drift align with PHD2
3d flat image

Tutorial how to do a time lapse astronomy video

Time lapse tutorial
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