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November 18, 2018

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I spend this website many hours each week to share my knowledge and experience from the areas of Astronomy, Cars and Travels. Most pages are written in English that is not my own native language, so do not judge me too hard if you find grammatical errors and more.

Welcome to my home!


(these pages could be a mix of Swedish and English)



Here I have collected news I found interesting.

Technology, Astronomy, Cars, Travels etc.

November 18, 2018

Lisbon mini vacation

November 17, 2018

Star Adventurer and angled viewfinder

November 16, 2018

Lisbon Astronomical Observatory

November 9, 2018

I collect them in a gallery for comparison later.

Macro photography: Rose hip

November 3, 2018

November 2, 2018

Macro slider setup and test

October 30, 2018

  • A simple astrophotography test of the medium format Pentax 67 165 mm f/2.8 lens. I was so curious about this so I couldn't wait until I had a clear sky. Astronomy test photos taken from my balcony with heavy light pollution:

    astronomy/ projects/ project-pentax67-test/ project-test-pentax67-lens.html
    (Astrophotography test of Pentax SMC 67 165 mm f/2.8)

    I will do a new analyze later when I have more quality data

Medium format Pentax 67 165 mm f/2.8, astrophot test

October 27, 2018

Sigma vs Pentax, vignetting

October 23, 2018

Astronomy: Many short vs Few long exposures

October 21, 2018

  • One day at Mantorp Park race track:

    When I was young about 55 years ago I followed my dad to Skarpnäcks race track, an earlier air field. I have not visit any more race track since then, just a couple of drag race. I felt it was time do do it once again. And more, two of our friends, Jürg and Niklas are drivers today.

    vehicles/ mantorp-race-track-2018/ mantorp-park-race-track-2018.html
    (Mantorp Park race track, 2018)
Mantorp race track, 2018

October 19, 2018

M45 Pleiades 2018

October 19, 2018

Moon light on the sky

19 oktober, 2018 Sweden

  • Uppdatering:
    Nu har jag exempel på Tyresta vid Spirudden samt Hagsätra där jag bor.

  • Uppdatering:
    Kunde inte låta bli, nu har jag lagt till en enkel beräkning för att visa skillnaden i signal /brus förhållande.

  • Uppdatering:
    Vi har haft några mörka kvällar ett par dagar nu. Jag passade på att ta några foton av M45 (Plejaderna) för att se om det syns någon skillnad mellan de olika platserna som jag skrivit om. Skrolla ned till slutet av sidan så ser du testerna från Ingarö och Gålö, med lite tur kanske jag kan testa Tyresta naturreservat någon natt längre fram.

  • Bor du i södra Stockholm och har svårt att hitta mörka platser att fotografera stjärnhimlen ifrån? Här är några förslag från mig och mina vänner:

    astronomy/ observationsplatser/ observationsplatser.html
    (Observationsplatser södra Stockholm)
M45 Plejaderna från Gålö Stockholm

October 12, 2018

  • Crete, island of Greece.

All days complete:

Crete, island of Greece

The travel report is now finished and online.

  One week at Crete, 2018

October 8, 2018

  • Tutorial: Remote control of Canon camera from a smart phone.

How many times have you tried to see the camera display when the camera pointing upwards to the stars? In my attempts to make my transportable astronomy equipment more user friendly I'm doing this. Make my Canon camera remote controlled from a smart phone:

Tutorial: How to make a Canon camera remote controlled

It's not difficult to use this remote function and you can use this to much more than just astrophotography.

Remote control of Canon camera from smart phone
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New links:

Here I have collected new links that I found interesting.

Technology, Astronomy, Cars, Travels etc.

28 October, 2018

Many years ago I read about CMOS sensors that in future could have non destructable read out. With that technique you can read out one pixel many times and with reduced readout noise. Alternative read out one low gain and one high gain and then combine these two readouts as a high dynamic data read out.

One problem, expensive! I hope that normally DSLR cameras use this technique in future.

1 October, 2018Swedish

Här är något unikt, bygg din egen Ford Hot Rod med nytillverkade svenska delar.

  • Nytillverkade delar till ditt Hot Rod bygge i olika färdigställande nivåer:

21 September, 2018

Recently I found at Youtube some very interesting historical maps, from Sweden where I live to the whole world. They are animated and very educational too look at. There are information about people, borders, war and more. You will learn a lot from these.

If you live in Sweden as I do, start with the Swedish map to test your memory from the history lessons in school.

31 August, 2018

  • How did NASA get those great film shots of Apollo and the Shuttle?

    (Curious Droid, NASA cameras, Youtube)

If you are interested in photography you must see this mini documentary about NASA's cameras.

You find above links later on the link page:

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Must do stuff:

Technology, Astronomy, Cars, Travels etc.

(look carefully that it has not been canceled or has a changed date)


  • If you ever come to Bulgaria you have to visit this observatory: index_en.html
    (Bulgarian observatory Rozhen NAO)

    Look at the photos, what a beautiful place at altitude 1700 m. I hope that we can visit that place in the future.

  • At the same place the amateur astronomy club Stellar Society Association have their observatory. Here is a video over the construction of the observatory: watch?v= 5d2ORktuuZg
    (Bulgarian amateur astronomers observatory)

A tips from Ivo, the man who develop the APT camera control software.

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Föredrag: (Stockholm, Sverige) Sweden

This is only for you who live in Stockholm, Sweden or want to travel and make a visit here.

De flesta av de här föredragen hålls i Stockholm. Vanligtvis är de på svenska men ibland på engelska. Läs noga på deras hemsida så att det inte blivit inställt eller flyttat.

Området är naturvetenskap.

28 november 2018


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