Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
  #1
My First Stacked Star Trail Photograph
Posted By: Christopher M.W.T, 08-18-2009, 07:31 AM

I learnt to do this tonight using this tutorial

Lets Go Streaking, a Guide to Star Trails : Liquid in Plastic – Photography and Words by Dan Newton

Tools used.



My K7

No tripod (I just sat the camera on the ledge)

16 shots in raw plus one dark frame (turned off slow frame NR, then turned it back off tor the dark frame)

ISO 500
f6.3 (Pentax DA16-45)
30" Shutter
Cable Release (I found interval timer inbuilt didn't work properly for some strange reason)

Photoshop CS4
Lightroom (to process the raws)
Star Trails (this app really suprised me, its amazing)
Vertus fluid mask

Believe it or not I used absolutely no noise reduction software.
Views: 3,690
08-18-2009, 07:37 AM   #2
Veteran Member
Taff's Avatar

Join Date: Aug 2008
Location: Perth Western Australia
Photos: Gallery | Albums
Posts: 1,612
But thousands of $$$ worth of software
08-18-2009, 01:51 PM   #3
Veteran Member




Join Date: Jun 2009
Posts: 1,689
Original Poster
QuoteOriginally posted by Taff Quote
But thousands of $$$ worth of software
Really? hmmm. Maybe it is, but it's worth it.

Good thing is I didn't fork it out

Last edited by Christopher M.W.T; 08-18-2009 at 03:05 PM.
08-18-2009, 07:25 PM   #4
Millionth Poster!
Site Supporter
Scottnorwo's Avatar

Join Date: Aug 2008
Location: Stafford, New York
Photos: Gallery | Albums
Posts: 3,084
great shot

08-18-2009, 08:17 PM   #5
Veteran Member




Join Date: Jun 2009
Posts: 1,689
Original Poster
Anyone else had much luck with image stacking?

I tried another method strictly using photoshop and layering each exposure using the SCREEN overlay and got really poor results, ended up bring out a lot of image noise even at 100iso.
08-18-2009, 09:46 PM   #6
Ash
Moderator
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 23,818
Good capture(s).
Though I've not done image stacking - rather just Bulb mode with cable release for however long I want - that seems to work fine too.
08-18-2009, 11:44 PM   #7
Veteran Member




Join Date: Jun 2009
Posts: 1,689
Original Poster
QuoteOriginally posted by Ash Quote
Good capture(s).
Though I've not done image stacking - rather just Bulb mode with cable release for however long I want - that seems to work fine too.


How noisy are your shots using BULB mode?

08-19-2009, 12:05 AM   #8
Ash
Moderator
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 23,818
Not noticeable much at ISO 160-250 (where I shoot the long exposures) for about 20-45 mins. Exposure must be spot on, however, to avoid gaining noise in PP.
Others have seen this one, but here are my 45, 20 and 5 minute shots respectively with the K10D (first 2) and *ist D (last one):







No NR applied in PP, only selective colouring.
08-19-2009, 12:26 AM   #9
Veteran Member




Join Date: Jun 2009
Posts: 1,689
Original Poster
QuoteOriginally posted by Ash Quote
Not noticeable much at ISO 160-250 (where I shoot the long exposures) for about 20-45 mins. Exposure must be spot on, however, to avoid gaining noise in PP.
Others have seen this one, but here are my 45, 20 and 5 minute shots respectively with the K10D (first 2) and *ist D (last one):







No NR applied in PP, only selective colouring.

Looks awesome, can you please clarify what you mean by getting the exposure spot on? I'm still getting my head around appropriate exposures for Star trails.
08-19-2009, 12:46 AM   #10
Ash
Moderator
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 23,818
Correct exposure to me means getting the exposure triad (Av, Tv, ISO settings) correct in camera, and so not needing to 'push' exposure up or down by very much at all in post-production, because that is where all the supposed 'low-ISO noise' comes from.

You have to test your settings with the ambient light in the capture with a short (perhaps 2-5 mins) exposure to ensure the stars register on the sensor. Once this is right, it actually doesn't matter how long you leave the shutter open since the stars move and will not 'burn' any particular part of the sensor...

Your only limiting factor will be ambient light coming in from street lights/other light sources. The more there is, the less you can afford to have a long exposure (like my last example, which had a significant amount of street light that started overexposing the truck).

Hope this helps.
08-19-2009, 01:32 AM   #11
Veteran Member




Join Date: Jun 2009
Posts: 1,689
Original Poster
QuoteOriginally posted by Ash Quote
Correct exposure to me means getting the exposure triad (Av, Tv, ISO settings) correct in camera, and so not needing to 'push' exposure up or down by very much at all in post-production, because that is where all the supposed 'low-ISO noise' comes from.

You have to test your settings with the ambient light in the capture with a short (perhaps 2-5 mins) exposure to ensure the stars register on the sensor. Once this is right, it actually doesn't matter how long you leave the shutter open since the stars move and will not 'burn' any particular part of the sensor...

Your only limiting factor will be ambient light coming in from street lights/other light sources. The more there is, the less you can afford to have a long exposure (like my last example, which had a significant amount of street light that started overexposing the truck).

Hope this helps.
Gotcha, thanks for that
08-19-2009, 02:09 AM   #12
Ash
Moderator
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 23,818
Welcome, mate.
08-19-2009, 03:17 AM   #13
Veteran Member




Join Date: Apr 2008
Location: Surfcoast Victoria Australia
Posts: 560
That is quite a cool shot. Did the smell of KFC put you off much?
08-19-2009, 05:03 AM   #14
Site Supporter
Site Supporter
dcmsox2004's Avatar

Join Date: Apr 2008
Location: rhode island
Photos: Gallery | Albums
Posts: 7,522
thanks for posting these great shots... the technical aspects are beyond me...
but the results speak volumes....... as my 11 yr old nephew would say, way cool!!
08-19-2009, 02:30 PM   #15
Veteran Member




Join Date: Jun 2009
Posts: 1,689
Original Poster
QuoteOriginally posted by Dale Quote
That is quite a cool shot. Did the smell of KFC put you off much?
Nah can't smell it up there, the exhaust fans blow it high into the hair.

How'd you know? lol
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, frame, photo, star, star trail, trails
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Night Star Trail. xedent Post Your Photos! 3 07-09-2010 02:24 PM
Night Star Trail Above Greek Church Christopher M.W.T Post Your Photos! 4 06-09-2010 02:33 AM
Taking star trail pics timstone Photographic Technique 4 05-08-2010 07:08 PM
Star Trail Photography rustynail925 Photographic Technique 15 03-09-2010 11:12 AM
Star Trail Software? konraDarnok Digital Processing, Software, and Printing 8 10-17-2009 03:43 AM



All times are GMT -7. The time now is 09:47 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top