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Forums Lobby MASTER YOUR VISION - BY SPECIALTY Landscape (Public) topic #69753
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Subject: "RE: Beginning Night Sky Questions" Previous topic | Next topic
polardan Registered since 30th Sep 2012Tue 13-Nov-12 09:53 AM
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#1. "RE: Beginning Night Sky Questions"
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Tue 13-Nov-12 10:07 AM by polardan

Gisborne, AU
          

Here's a quick one. D700, 20mm lens, ISO 4000. F2.8. 30 second exposure.

I can't help you with the D90, sorry.

There is a lot of trial and error in getting the composition correct. However the sky doesn't tend to move away too quickly! In this shot, I was able to shine a torch on my boy to help compose (then set the timer and scramble up to join him) , but still needed several shots to get it all level. It was a absolutely pitch black otherwise (new moon, middle of the Australian desert), and stars were not really visible through the D700 viewfinder.

How much star movement depends on the time and the focal length. There are many on here far more educated than me on the subject so I won't go into it. But basically wider angle, less star movement, longer exposure possible.

The blurred stars at the top of the image are caused by the lens. Stopping down to F8 should prevent this, which I will try next time.

I have found that adjacent star images (with the same settings of course) join very well in panorama programs and I did this to get rid of the blurred stars in the corners of images.

The other thing you might look into is image stacking. Basically several photos taken consecutively, then blended by a program that realigns them.

https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-ash3/549569_10151003297916537_923056482_n.jpg

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A general, generic topicBeginning Night Sky Questions [View all] , MarcG19 , Tue 13-Nov-12 08:07 AM
 
Subject Author Message Date ID
Reply message RE: Beginning Night Sky Questions
polardan
13th Nov 2012
1
Reply message RE: Beginning Night Sky Questions
GiantTristan Silver Member
17th Nov 2012
2
Reply message RE: Beginning Night Sky Questions
MarcG19
19th Nov 2012
3

Forums Lobby MASTER YOUR VISION - BY SPECIALTY Landscape (Public) topic #69753 Previous topic | Next topic


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