bjolester

Joined: 30th January 2010

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bjolester
I spent many hours in freezing temperatures (around minus 15 celsius) the night between the 13th and 14th, and also Friday 14th evening, attempting to catch Geminid Meteors. I took many hundred photos, and luckily I managed to capture some meteors. C and C are welcome!

1.
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2012-12-13 Geminid Meteor by bjolester, on Flickr

2.
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2012-12-13 Geminid Meteor by bjolester, on Flickr

3.
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2012-12-14 Geminid Meteor by bjolester, on Flickr

4.
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2012-12-14 Geminid Meteor by bjolester, on Flickr

Bjørn

Comment by bjolester posted on Geminid Meteors at 15/12/2012 - 18:32

bjolester
Superb set! Thank you for sharing.

Best regards
Bjørn

Comment by bjolester posted on Frost! at 10/12/2012 - 18:47

bjolester
A very nice set! My favorite is number 3.

Best regards
Bjørn

Comment by bjolester posted on This afternoons efforts at 02/12/2012 - 06:53

bjolester
A deeply moving set. Thank you for sharing!

Best regards
Bjørn

Comment by bjolester posted on Head above the parapet at 30/11/2012 - 09:17

bjolester
ReklawyksEkul wrote:
It seems that the app didnt cover the UK, it covers observatory in norway on north america but not in the UK
I do not have a smart phone, so I have direct experience with this app. But I believe this website broadcasts the same forecast system as the mobile phone app:

http://kho.unis.no/Forecast.htm

And when watching the diagrams on this website, many locales on the planet are covered: Scandinavia, China, Alaska, etc. The UK is also covered on this website. The most important thing with this app is that it is updated every 15 minutes and that it shows the intensity of the Northern Lights. In other words, if the forecast predicts aurora level 9 it will be visible in as far south as Spain

Regards
Bjørn

Comment by bjolester posted on Northern Lights above Trondheim at 28/11/2012 - 21:53

bjolester
For those of you with a smart phone (iPhone, Android, Windows phone), there is a new aurora forecast app:

http://appex.no/referanse/apps-til-kjell-henriksen-observatory/

Although the page is in Norwegian, you can find the download menu at the bottom of the page on the right hand side. The iPhone app can also be found at the Apple App Store. I have not tried this app myself, relying on stone age technology (Sony Ericsson W810i:shock, but a friend of mine is very impressed with the aurora app on his iPhone4.

I have mostly used the Fairbanks Alaska forecast linked by Gwyn in the previous post.

Regards
Bjørn

Comment by bjolester posted on Northern Lights above Trondheim at 27/11/2012 - 19:12

bjolester
Thank you Gwyn!

Regards
Bjørn

Comment by bjolester posted on Northern Lights above Trondheim at 27/11/2012 - 17:29

bjolester
A very nice set altogether, and my favorite is the first image. I find both the colours and the composition especially appealing in number one.

Best regards
Bjørn

Comment by bjolester posted on Some long(ish) exposures at 25/11/2012 - 19:24

bjolester
PaulEvans wrote:
I think the star trails critical shutter speed may actually vary depending on whether you're pointing your camera towards the equator or a pole, but I'm not good enough at maths to work out how.. Paul
Your assumptions about star trails seem logical, there is really a lot to learn about astrophotography. One day I will find some books on this subject and do some serious studying

I hope your travel to Sweden will be successful!

Best regards
Bjørn

Comment by bjolester posted on Northern Lights above Trondheim at 25/11/2012 - 19:11

bjolester
Thank you iqbal and Paul!

All the images were taken at 12mm with ISO 1600 and f4.

Shutter speeds:
1. 20 sec
2. 20 sec
3. 13 sec
4. 13 sec
5. 15 sec

Based on my humble calculations, star trails will appear with longer exposures than 33,33 seconds at 12mm
(600:12:1,5 crop factor). So with my set-up (at 12mm) I never use longer exposures than 30 seconds for this kind of night photography.

Regards
Bjørn

Comment by bjolester posted on Northern Lights above Trondheim at 25/11/2012 - 09:49

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