Author Topic: Star trails, first attempt  (Read 15849 times)

MichalLeder

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Star trails, first attempt
« on: March 19, 2013, 12:14:51 PM »
Hi, last weekend thanks to good weather conditions I have made a timelapse (naturally using ML) of the starry sky. This time I have tried smearing the star trails in post. Visit my fotoblog (click the image) to check the result http://lederfotoblog.blogspot.com/2013/03/star-trails-first-attempt.html


Admin, plz, move it back to videos, as this was about the video from the very begenning. Sorry, that it was not clear then, but I had difficulties on embedding Vimeo video. Thank you!

Betelgeuza

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Re: Star trails, first attempt
« Reply #1 on: March 21, 2013, 01:36:26 PM »
stars on left midle down `rotating` in difrente direction ..maybe lenss problems ? or try do some lenss coretctions..

Walter Schulz

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Re: Star trails, first attempt
« Reply #2 on: March 21, 2013, 02:12:27 PM »
Think it over! ;-) Hint: Northern and southern hemisphere catched in the frame
http://500px.com/photo/1622099
http://www.flickr.com/photos/angelrls/7703201452/

For own tests (in shorter time)
http://physics.weber.edu/schroeder/sky/skymotionapplet.html


Ciao!
Walter Schulz


MichalLeder

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Re: Star trails, first attempt
« Reply #3 on: March 21, 2013, 02:44:11 PM »
Think it over! ;-) Hint: Northern and southern hemisphere catched in the frame[...]

That's it! Thanks Walter!

Betelgeuza

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Re: Star trails, first attempt
« Reply #4 on: March 22, 2013, 08:01:25 PM »
guys comon this is not real....earth not rotating like this ;) ..


this is not my Shot but This is Good maded Stars Trails picture :

http://apod.nasa.gov/apod/image/0512/startrails_gemini_big.jpg

Walter Schulz

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Re: Star trails, first attempt
« Reply #5 on: March 22, 2013, 08:33:23 PM »
You are stubborn but wrong.
You know "Stellarium"? View to south-west, press "e". You may notice the lines below 0 degrees.
And it has to be that way.
Or do you think there is a conspiracy among photographers, astronomers and mathematicians?



Ciao, Walter

Betelgeuza

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Re: Star trails, first attempt
« Reply #6 on: March 22, 2013, 08:36:57 PM »
well... ok nasa is wrong u are right ..end of subject ..

Walter Schulz

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Re: Star trails, first attempt
« Reply #7 on: March 22, 2013, 08:49:27 PM »
If you use Stellarium (or any other astronomic software) *and* think it over, you will see that the picture you shown contradicts nothing at all. Your picture shows the view you get if the Polar Star is in/near the center. However, if you have parts in the frame which are below the astronomic horizon equator you will get trails bending to the south.

Ciao, Walter

Betelgeuza

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Re: Star trails, first attempt
« Reply #8 on: March 23, 2013, 01:07:42 AM »
If you use Stellarium (or any other astronomic software) *and* think it over, you will see that the picture you shown contradicts nothing at all. Your picture shows the view you get if the Polar Star is in/near the center. However, if you have parts in the frame which are below the astronomic horizon equator you will get trails bending to the south.

Ciao, Walter

I must say i done some checks and u are right in some point.. looks like my star trails are always was done with Polaris in the midle.. so new expirence..

Personal i prefer more open shuter and long expo for star trails than procesing it with program he used..  here stars looks more  like comets ( damn clouds and pan starr ) and with not muche color .. but its always good to learn some new expirence about rotation

MichalLeder

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Re: Star trails, first attempt
« Reply #9 on: March 23, 2013, 08:28:40 PM »
Betelgeuza,

1. Stars look like comets because while stacking in PS in "lighten" mode I added darkening by some factor at each step. This is a intended effect.
2. What you think looks like panstarr comet is a new moon
3. I have made the timelapse sequence to make the small video (I am hoping to be a part of bigger project) - this was my primary aim. Click the image to be redirected to my blog page where the mentionev video is embedded.

SDX

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Re: Star trails, first attempt
« Reply #10 on: March 24, 2013, 01:46:14 AM »
I really liked it, Michal, especially the composition of the foreground. However, you should consider whenever it is a good idea to have the moon in the frame. Moonlight is quite a cool thing when it comes to startrails, it's light often improves the foreground allot - but in the frame itself, it takes allot of the light from the stars.

And for the comet-like thing: I don't know if you did it manually, but I just want to point out, that you can automatize the process in PS ;)

MichalLeder

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Re: Star trails, first attempt
« Reply #11 on: March 24, 2013, 10:44:08 PM »
Hi SDX, thanks for the comment. I must have had the moon in the frame that night. Unfortunately I do not have enough time for night shots and conditions were as they were. In other directions I had ugly lights of the big city (20km) or the non-composing villages. I am waiting for moonless nights and some better weather conditions (that night it was -11 C).

> And for the comet-like thing:
This is the moon itself.

> you can automatize the process in PS
Thanks for that tutorial - I will study it soon! My process was half automatic - I must have had name and save each file after the PS action.

Betelgeuza

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Re: Star trails, first attempt
« Reply #12 on: March 25, 2013, 04:35:19 PM »
Betelgeuza,


2. What you think looks like panstarr comet is a new moon



:D no no .. i dont mean Moon..i mean all stars  looks like small commets  with  tail on end..i things is still ok ..its in some point ART so can be whatever maker wish.. but.. i dont mean PanStaRR.. by saying (  damn clouds and pan starr ) i was little jump out of subject.. and that was accoording to Real comet what i trying to shot but Clouds again and agian..hiding all Sky... so that was on margin .

why dont u try  regular old like astrophotography way of making star trails ? open shuter 1 hour or more..analog camera making beautyfull shots with just one frame all stars got  grate real colours and trails are like magical lines of light..( ilove stars trails of Sirius , that three stars light making grate clours )..shots of stars trails.. im not sure if i can ( becauze its out of subject in some point )but i can search for my old star trails shot (( what i not promise i find ) what i done with  one frame ..so if Analog can do it Digital can it to.. why game in  time lapse and procesing  900 shots ? when u can all do done by one Shot..dont  take me bad its just option

MichalLeder

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Re: Star trails, first attempt
« Reply #13 on: March 25, 2013, 10:30:41 PM »

 why game in  time lapse and procesing  900 shots ? when u can all do done by one Shot..

Hi Betelgeuza, to get an answer why, get back to first post, I finally embedded video correctly :-D