News:

Here I have collected news I found interesting.

Technology, Astronomy, Cars, Travels etc.

December 6, 2018

• Astronomy: Many short vs Few long exposures:

  astronomy/ tutorials/ tutorial-dynamics/tutorial-dynamics.html
  (Photo's dynamic)

  One more example added.

November 22, 2018

• Five days at Lisbon:

  travel/ europe/ travel-europe-portugal-lisbon/ 01-portugal-alfama.html
  (Lisbon mini vacation, all five days online)

November 20, 2018

• Chrysler Crossfire, Replacing the heater blower:

  vehicles/ my-cars/ chrysler-crossfire/ heater-blower-fan-replacement/ 01-heater-blower-fan-replacement.html
  (Replacing the heater blower)

November 17, 2018

• If you living north or south you have problem to look into the polar scope. I have built an adapter to have an angled viewfinder on the polar scope:

  astronomy/ projects/ project-star-adventurer-angled-viewfinder/ project-star-adventurer-angled-viewfinder.html
  (Star Adventurer and angled viewfinder)

November 16, 2018

• At our last travel to Lisbon we visited for us a new observatory. We already before we go know that we had to book a guided tour 2 weeks in advance, but this was a last minute travel so it was too late. We hoped to come close to the observatory anyway:

  astronomy/ observatory-sites/ lisbon-astronomical-observatory/ lisbon-astronomical-observatory.html
  (Lisbon Astronomical Observatory)

November 9, 2018

• A new test, this time with the Pentax Super Takumar 55 mm lens:

  photography/ macro-photography/ macro-gallery-test/ macro-gallery-test.html
  (Macro photography: Rose hip, scroll down the page)

I collect them in a gallery for comparison later.

November 3, 2018

• Have you ever been to Tenerife? I like the island a lot, nice old towns, sunshine when we have winter in Sweden. Teide, the big mountain is exiting and there is also an observatory there. We did this travel 2016:

  travel/ europe/ travel-europe-spain-tenerife-2016/01 spain tenerife puerto de la cruz.html
  (Tenerife, Spain)

October 27, 2018

• Astronomy: Comparing the Sigma APO 150 mm APO f/2.8 lens with Pentax SMC 67 165 mm f/2.8:

  astronomy/projects/project-sigma-pentax-vignetting/project-sigma-vs-pentax.html
  (Sigma vs Pentax, vignetting)

  This is a test where I compare the vignetting between these two lenses.

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)

October 19, 2018

• This is just something I want to show, what's the difference when Moon is up or down when taking astrophotographs?

  astronomy/ tutorials/ tutorial-moon-light/ tutorial-moon-light.html
  (Moonlit night sky test in Stockholm)

19 oktober, 2018

• 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)

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:

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

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.

• FLI has an astronomy CMOS camera that can do that:

  https://www.flicamera.com/ kepler/ kepler.html
  (FLI Kepler KL4040, FLI)

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

You find above links later on the link page:

• Links

Must do stuff:

Technology, Astronomy, Cars, Travels etc.

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

December, 2018

• Comet 46P/Wirtanen visit us:

  http://www.aerith.net/ comet/ catalog/ 0046P/ 2018.html
  (46P/Wirtanen, Seiichi Yoshida)

• Look at your local star map where it is and its orbit, you can use CdC or Skychart:

  CdC or Skychart (Free to download)

• More information from Wikipedia about the comet 46P/Wirtanen:

  https://en.wikipedia.org/ wiki/ 46P/ Wirtanen
  (46P/Wirtanen, Wikipedia)

It could be as bright as magnitude +4 but still difficult to see by naked eye because of it's diffuse core. If I'm lucky to get a clear sky I will try to catch it with my 150 mm lens on full frame DSLR camera. Lots of one minute exposures at high ISO setting.

Föredrag: (Stockholm, Sverige)

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.

2018

• Visningar av Alba Nova teleskopet:

  http://www.astro.su.se/ om-oss/evenemang/ teleskopvisningar
  (Alba Nova teleskopet, Stockholms universitet)