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FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial 
Thread started 24 Jan 2012 (Tuesday) 13:03
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tkerr
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Jan 24, 2012 13:03 |  #1

Star trails of a different sort.

IMAGE: https://lh3.googleusercontent.com/-bsqUjddj8qE/Tx7-WEaoIzI/AAAAAAAAGQE/R2_1fcWjpbE/s912/ZoomStarTrails.jpg

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SteveInNZ
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Jan 24, 2012 13:14 |  #2

Very arty. I like that you've taken a couple of different techniques and created something new.
It's the perfect cover shot for a Mayan 2012 calendar. :)


"Treat every photon with respect" - David Malin.

  
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tkerr
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Jan 24, 2012 13:45 |  #3

Here is the before and after Photoshop trickery.

IMAGE: https://lh5.googleusercontent.com/-C2j8orwTpIQ/Tx8JCaukQJI/AAAAAAAAGRQ/0Mclhu6_0b0/s720/zoomingtrailsoforion.gif

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SteveInNZ
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Jan 24, 2012 14:23 |  #4

It sure brings out the CA. :)


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tkerr
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Jan 24, 2012 20:42 |  #5

Tried something slightly different with this one.

IMAGE: https://lh4.googleusercontent.com/-tkWlT76ddNY/Tx9pDXlnTAI/AAAAAAAAGR4/IT-iMfsiTsU/s720/WhiteOakStarTrails.jpg

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Snydremark
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Jan 24, 2012 20:49 |  #6

I like the first one better; but looks like you're having fun :)


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tkerr
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Jan 24, 2012 20:54 |  #7

Snydremark wrote in post #13763307 (external link)
I like the first one better; but looks like you're having fun :)

Hmm, Really, I thought the first one looks too busy.

Thanks for the feedback though, I do appreciate it.

The only reason I did these is because I was told this effect would be hard to duplicate with Photoshop. It's actually quite easy.


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roxiedog13
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Jan 27, 2012 21:32 |  #8

tkerr wrote in post #13763342 (external link)
Hmm, Really, I thought the first one looks too busy.

Thanks for the feedback though, I do appreciate it.

The only reason I did these is because I was told this effect would be hard to duplicate with Photoshop. It's actually quite easy.

Reminds me of launching into light speed on Star Wars or Star Trek too I guess.




  
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Estorki
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Jan 28, 2012 05:06 |  #9

Excuse me, but, could you explain how you achieve that result?

Thanks




  
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tkerr
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Jan 28, 2012 08:07 |  #10

Estorki wrote in post #13782358 (external link)
Excuse me, but, could you explain how you achieve that result?

Thanks

If you want to do it for real you use a zoom lens and zoom in during the exposure.

For these pictures however I used Photoshop CS5.

1.) Open the image make any edits or correction you might usually make to an image. I.e. Sharpen, or NR. Especially, NR. too much noise will only increase as you go when doing this.

2.) Duplicate the Layer.

3.) On the Duplicated Layer, Mask anything in the forground to black so that it won't blur when you create the zoom effect. (this is optional. if you're trying to make it look like you actually dragged the zoom, the foreground would also be blurred/streaked).

4.) Change Layer Blending Mode to "Lighten"
Use the Free Transform in step and repeat mode. Keyboard short cut for that is Ctrl - Alt -T, or (Cmd -Opt -T on a Mac)

5.) Grab on of the corners with your mouse while holding down the Shift and Alt(opt) Keys. (That will keep the adjustment constrained to the center of the image). Move the transform box inward a few pixels. Press the enter key, or click the check mark when done with the transform

6.) Here you can click on the layer thumbnail while holding the Ctrl(Cmd) Key to prevent this next step from making multiple duplicate layers.

7.) While holding down the Shift - Ctrl - Alt keys, press T. Each press of the T while holding the Shift - Ctrl - Alt key will repeat your transform moving it in progressively.

8.) This step isn't necessary, but it might help.
Create another Duplicate of the Original Background Layer and move it to the top of the order. Change the blending mode to "Soft Color" and then adjust the layer opacity until the streaks show through how you like.


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archer1960
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Jan 28, 2012 11:30 |  #11

tkerr wrote in post #13782697 (external link)
If you want to do it for real you use a zoom lens and zoom in during the exposure.

...

At first, I thought that's what you were doing until I noticed that the tree didn't have the trails.


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tkerr
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Jan 28, 2012 14:04 |  #12

archer1960 wrote in post #13783541 (external link)
At first, I thought that's what you were doing until I noticed that the tree didn't have the trails.

So far it looks like the skies will be clear for a while tonight. If it stays this way I am going to try it for real. Even with a nice tripod the challenge is going to be zooming in without shaking the camera too much.


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NovaTJ
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Jan 29, 2012 16:30 as a reply to  @ tkerr's post |  #13

I followed your steps Tim, well more or less, but got some fun pictures anyway!

Greg


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tkerr
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Jan 29, 2012 16:59 |  #14

NovaTJ wrote in post #13790012 (external link)
I followed your steps Tim, well more or less, but got some fun pictures anyway!

Greg

I didn't get it the first time. Took a few times until I got the trails to look good enough.

It's best to start with a full size, Large Raw image file, and then all it takes is a two or three pixel move. I magnify the image to 200% so I can see the pixels as I make the adjustment. Even at that large you might see a little separation in the stars, but not much. Once you reduce the image size it won't be as noticeable. However, if you want you can use a 2 or 3 pixel Zoom Radial Blur to blur the dots together.

Another thing you can do to give it a little more of a warped look is to use the Pucker Liquify Filter.


Tim Kerr
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