Revolving with the stars!

Posted by Expose (Tehran, Iran) on 1 March 2008 in Plant & Nature and Portfolio.

Star trail
Ovan Lake, Qazwin-Iran

About the method:
Since the Earth rotates, the stars are not at fixed places in the sky but appear to move, more or less towards the west. To photograph the tracks the stars make across the sky, all you need is a camera that remains fixed to ground and have it expose for an appreciable amount of time. Such photos can be quite artistic.

The stars appear to rotate around both the north and south poles in the sky, of which you generally only see one. Stars very near the pole are almost stationary in the sky, while stars closer to the equatorial plane move quite fast. All move about 15 degrees per hour in right ascension ("horizontally"), but do not move in declination ("vertically").

Star trail photos are always eye-catching, if done correctly. The major problem doing these exposures is that they can last a long time, like several hours. If you have nothing else to do this will be boring. I make my star trail photos during every photography session that I have at night, provided the sky is clear and I stay a long time at the vantage point. You can combine star trail photography very well with astronomy in general.
My Setting:
ISO: 200
F: 4.0
S: 30 Min
Time : 8:00 PM

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Friends / لینک فتوبلاگ دوستان :

Alireza / عليرضا
Amir Sooki / امیر سوکی
Mahdi Behtash / مهدی بهتاش
Dr. N. Kohansal / دکتر نادر کهنسال
Mohammad Fakhar / محمد فخار
Farhang Payam / فرهنگ پیام

Amirali from United Kingdom

This a great trail shot. very well done! I was thinking what was the ISO. normally they do it with low ISO speed and a closer aperture, but longer exposure time.

1 Mar 2008 12:36pm

@Amirali: Thanks Amir ali, Yes you are right, but LOW ISO and Close Aperture are not recommended when you are at the situation that the light is so poor and also the sky is fogy.
Anyhow, thank you so much for the note.
I'm happy that you liked it.

Ina from Krugersdorp, South Africa

Excellent work! My shutter can only stay open for 30 secs so I don't think I will have the pleasure? :(

1 Mar 2008 1:41pm

Will from Gainesville, United States

wow! great shot:)

1 Mar 2008 2:03pm

shahab from Qazvin, Iran

Stunning shot!So beautiful!But I agree with Amirali & prefer a closer apeture in here.

1 Mar 2008 3:03pm

Stefan Thaler from Thiersee, Austria

Stunning, good work!

1 Mar 2008 6:03pm

Amir Sooki from Iran

vaveylaaaa !!!!
d300 chikara mikone !
dar zemn ye meghdar fohsh talabet.

1 Mar 2008 6:42pm

Aaron Schmidt from Auckland, New Zealand

An excellent shot ... you've got a great composition here.

1 Mar 2008 9:43pm

lidia from Spain

A very good shot.

2 Mar 2008 12:21am

PiXeLaRt from Larestan, Iran

khosh be halet ke az oon doorbin khooba dari!!:(

2 Mar 2008 12:44am

Jason Kravitz from Brussels, Belgium

well done! Love the snowy mountains in the background.

2 Mar 2008 11:44am

@Jason Kravitz: Thank you Jason, I'm happy you liked it.

Betsy Barron : www.thebetsy.com from Glenmoore, United States

Outstanding! Thanks for the tutorial - it's going to be a bit warmer this week and I am going to try this!!

3 Mar 2008 1:37pm

@Betsy Barron : www.thebetsy.com: Thank you Betsy, I'm happy that you found the tutorial useful.
I'm sure that your shot will be better than mine.

ManuelaR from Hainburg, Germany

Excellent work!
The backdrop is also quite breathtaking ;)
Congrats for being on the spotlight frontpage -- well deserved!
http://www.aminus3.com/

3 Mar 2008 7:32pm

@ManuelaR: Dank für Ihr Besuchen und auch Ihre freundliche Anmerkung.
Ich bin glücklich, daß Sie es mochten.

Wysterior from Kloten, Switzerland

Awesome, half an hour.... great
Wys

3 Mar 2008 9:08pm

Ana Lúcia from Leiria, Portugal

Spectacular image.

3 Mar 2008 9:30pm

Saeed from Tehran, Iran

Excellent shot. very nice idea. This is approbative...

4 Mar 2008 6:53am

@Saeed: Thank you Saeed,
that's very kind of you, I'm happy you enjoyed that.

Amaia from Bilbao, Spain

Wow! It's really interesting and the picture is very beautiful.

4 Mar 2008 7:24am

MOHAMMAD from BANDAR ABBAS, Iran

nice shot

4 Mar 2008 7:42am

@MOHAMMAD: Thanks everyone for your kind attention to this blog.
I feel happy that you kind friends liked my not-well shots, it makes me obliged to try my best for future works.
:)

Paolo Micheli from Castelnuovo Garfagnana, Italy

stunning photo !
I nearly envy you, Great !
BRAVO

4 Mar 2008 1:23pm

@Paolo Micheli: Thank you Paolo, I do appreciate your all kind comments.
happy visiting my photoblog.
:)

smellygiraffe from Australia

WOW. that is spectacular. amazing shot!

4 Mar 2008 2:42pm

Martine from Quebec, Canada

Fantastic!

4 Mar 2008 6:48pm

Eleftheria, 9 years old, from Athens, Greece

5 stars are not enough for this!

5 Mar 2008 9:39am

@Eleftheria, 9 years old,: That's very kind of you dear.
I'm happy you liked it.
Thank you

Graham Russon from Cape Town, South Africa

Wow absolutely amazing photo. And thank you so much for sharing the information on how you did it. Great stuff.

5 Mar 2008 7:21pm

Melissa from Layton, United States

I've seen a lot of photographers try this technique, but never with such beautiful results. It really is stunning! It inspires me to try it myself.

5 Mar 2008 7:48pm

@Melissa: Than you Melissa,
I recommend to to take a try, it's really easy
If you have any question, just ask me.
be lucky

DarkElf from Perth, Australia

great result for your efforts - i really like this shot and i am hoping to take similar photos some time in the future - thanks for the explanation as well as it will help me to set up a scene like this...

6 Mar 2008 4:37am

@DarkElf: than you DarkElf,
I'm sure you do. be lucky
if you have any question, Just ask me.

pedro alexandre from loures, Portugal

wonderfull long exposure, tell me, wow do we calculate the time needed to leave the shutter opened?

8 Mar 2008 8:51pm

@pedro alexandre: Hi pedro,
first of all, please let me thank you for your visit and your kind comment.
About the timing I do prefer 10min- 45 min.
so it's up to you if you would like to have longer star trail or not.

Alfredo J. Martiz J. from Tokyo, Japan

I saw this photo the other day, but didn't take the time to write a comment, this is fantastic, I have been thinking of trying it but have found no time for that, hope to get some time to enjoy and take more photos!
This is a beautiful photo and thanks for the method!

11 Mar 2008 12:31pm

@Alfredo J. Martiz J.: Dear Alfredo.
many thanks for your kind comment, I hope you great moments in your life.
Thank again for your comment, I really appreciate it.

Elspeth from St. Augustine, Trinidad and Tobago

This is fantastic. I love star trail photos.

7 May 2008 12:05pm

Nikon D300
1809 second
F/4.0
15 mm (35mm equiv.)

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