Road Train !!!!!!!!!!

by Russell McMahon

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641 reputation
618
bio website davehfine.com
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visits member for 3 years, 6 months
seen Aug 25 at 2:53

Jul
2
awarded  Curious
Jun
12
awarded  Popular Question
May
8
awarded  Notable Question
Mar
9
awarded  Yearling
Dec
10
awarded  Notable Question
Sep
6
comment Why do I have blurry star trails?
@FakeName: "I think the issue here is probably that the OP has long-exposure noise-reduction on". A reasonable theory, but I checked and I had this feature turned off.
Sep
5
comment Why do I have blurry star trails?
I appreciate the advice. This is my second attempt at creating star trails. The first time I tried, I left the shutter open for about 15 minutes, but the image was very noisy and had lots of hot pixels. So this time, I tried reading some tips ahead of time, and the internet recommended stacking 30 second exposures to avoid noise and hot pixels: petapixel.com/2013/04/25/a-complete-guide-to-star-trailing, digital-photography-school.com/how-to-photograph-star-trails,
Sep
5
comment Why do I have blurry star trails?
I see the blocks you are describing. At first I agreed that it must be caused by the JPEG compression scheme. So I re-did the stacking, making sure to export the original images as uncompressed TIFFs before using them in StarStax. Then in StarStax, I doubled checked that I was exporting the stacked image as an uncompressed TIFF as well. The image blocks are still in the final image! It must be something that StarStax is doing...
Sep
5
comment Why do I have blurry star trails?
I see the issue you are describing when I zoom in very closely on the photo. I tried re-creating the image in StarStax with it's "gap filling" mode, which is supposed to resolve this issue. While the star trails look slightly better when zoomed in, the overall image still has the blurred effect just like in the original photo I posted. Here is the "gap filled" version: i.imgur.com/5lHl6xJ.jpg
Sep
5
comment Why do I have blurry star trails?
@MichaelClark: I've added the images you requested. Hope it helps explain the issue.
Sep
5
comment Why do I have blurry star trails?
@EsaPaulasto: I've added the images you requested. Hope it helps explain the issue.
Sep
5
revised Why do I have blurry star trails?
added requested photos of a single image from the set, and a 100% crop of the final image
Sep
4
comment What is the cause for this diffused artifact around the sun?
@Jakub: I've added the 3 original bracketed photos as requested. I used Photomatix in my HDR processing. Let me know if you get better results :) The settings I used were: 11mm, ISO 640, f/14. Shutter speeds varied between shots: 1/800, 1/3200, 1/200.
Sep
4
revised What is the cause for this diffused artifact around the sun?
added original bracketed images
Sep
3
asked What is the cause for this diffused artifact around the sun?
Sep
3
asked Why do I have blurry star trails?
Jul
27
awarded  Necromancer
Jul
21
awarded  Citizen Patrol
Jul
16
awarded  Critic
Jul
16
answered How will old M42 lenses work on a Nikon camera?