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Subject: "D80 RAW format problem-- making a dark flat for astroph..." Previous topic | Next topic
Dr Garry Registered since 11th Sep 2012Tue 11-Sep-12 11:19 AM
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"D80 RAW format problem-- making a dark flat for astrophotography not working"


AU
          

Hi All:

I'm a noobie tinkering with astrophotography. One of the things you do is to make a series of dark flat images, which are 1/4000 ISO 100 exposures with lens cap and eyepiece cover on. The idea is to capture wonky sensor elements (I think). You take these in NEF/RAW format.

A dark flat should look completely black with the odd wacky pixel. But my dark flat RAW images are cacophonies of coloured "snow". My understanding is that just ain't right.

When I make a dark flat using JPEG/Fine/Large it looks just like it's supposed to: entirely black with some wonky pixels. But you can't use jpegs for astrophotography.. they have to be RAW.

Any ideas? I open my images in Paint Shop Pro X2 just to see what they look like, and process them with DeepSkyStacker. My only thoughts are:

* Paint Shop Pro X2 does not open the Nikon D80 RAW format correctly.
* I should convert Nikon NEF to some normative RAW format.
* There's a tiny elf in my camera lighting a firecracker when I take the image.

Thanks for your time
Garry

  

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A topic tagged as in need of helpD80 RAW format problem-- making a dark flat for astroph... [View all] , Dr Garry , Tue 11-Sep-12 11:19 AM
 
Subject Author Message Date ID
Reply message RE: D80 RAW format problem-- making a dark flat for ast...
elec164 Silver Member
11th Sep 2012
1
Reply message RE: D80 RAW format problem-- making a dark flat for ast...
gkaiseril Gold Member
11th Sep 2012
2
Reply message RE: D80 RAW format problem-- making a dark flat for ast...
Dr Garry
11th Sep 2012
4
     Reply message RE: D80 RAW format problem-- making a dark flat for ast...
elec164 Silver Member
12th Sep 2012
5
          Reply message RE: D80 RAW format problem-- making a dark flat for ast...
Dr Garry
13th Sep 2012
6
Reply message RE: D80 RAW format problem-- making a dark flat for ast...
aolander Silver Member
11th Sep 2012
3

Forums Lobby GET TO KNOW YOUR CAMERA & MASTER IT Nikon D90/D80/D70 (Public) topic #251813 Previous topic | Next topic


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