Go Back   IceInSpace > Images > Solar System

Reply
 
Thread Tools Rate Thread
  #1  
Old 21-07-2005, 07:42 AM
iceman's Avatar
iceman (Mike)
Sir Post a Lot!

iceman is offline
 
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,799
Striker's Jupiter

Tony,

Here's my attempt at processing your Jupiter avi. It's actually quite a good image.

What settings did you use? (shutter, framerate etc)
How long was your capture? (how many minutes/seconds)
Was it with the ED80 or C11?

A couple of suggestions:
- It looks like you turned the brightness up to capture the moons.. while that's well and good, it can overexpose the planet, and that's what appears ot have happened here. The middle EQ zone is a tad overexposed. I prefer to have the planet properly exposed the forget about the moons.
- Use a barlow to increase the image scale, if the seeing is ok. It looks like the seeing wasn't the best for this image, but I think it could've stood up to at least a 2x barlow (assuming you were using the C11).

Other than that, it's a good image! You should be happy!

Processed in registax and astraimage.
Attached Thumbnails
Click for full-size image (striker-jupiter.jpg)
9.8 KB53 views
Reply With Quote
  #2  
Old 21-07-2005, 07:53 AM
iceman's Avatar
iceman (Mike)
Sir Post a Lot!

iceman is offline
 
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,799
I had a go at your moon avi as well, but you already did a good job processing it in your own thread. It was a tad too exposed but it just takes practise.

I'd recommend always leaving contrast and gamma at 0 (default) and brightness at 50 (default).

Use shutter speed and gain to alter your exposure.

Use the histogram bar on k3ccdtools to make sure it stays below 255 (white). If it's 255, it's overexposed and you'll get the bright white areas on your image. I aim for around 200-220 as the brightest portion so there's a good range.

It's better to slightly underexpose than overexpose.. the image processing techniques are much more favourable in brightening a darker image than darkening an already overexposed one - once it's bright white the detail is lost and can't be recovered.

HTH.
Reply With Quote
  #3  
Old 21-07-2005, 08:00 AM
Striker's Avatar
Striker (Tony)
Whats visual Astronomy

Striker is offline
 
Join Date: Dec 2004
Location: Brisbane
Posts: 5,062
Mine looked about 25% the quality of your picture Mike.

I used the C11 at F10 and yes the brightness was up much higher and the capture was 50 seconds.

The seeing was fairly bad with a fair bit of wind.

Shutter speed was also higher then 1/33

Thanks Mike.

Didn't someone do a guide regarding registax...??????
Reply With Quote
  #4  
Old 21-07-2005, 08:09 AM
iceman's Avatar
iceman (Mike)
Sir Post a Lot!

iceman is offline
 
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,799
Ok so next time:
- Use a 2x barlow to increase image scale.
- Capture for 90 seconds and no longer
- Capture multiple videos of 90 seconds, and process each of them. You'll be amazed at how much the seeing changes from minute to minute. I took 10 avi's of jupiter the other night, and only 1 of them produced a useable image. Sometimes it's the last avi of the night that gives me the best resultant image.
- As said above, leave brightness and other settings at default

I'll write a guide for registax in the next week or two.
Reply With Quote
  #5  
Old 21-07-2005, 08:11 AM
iceman's Avatar
iceman (Mike)
Sir Post a Lot!

iceman is offline
 
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,799
Oh also, get in the habit of quoting the Focal Length (FL), rather than the Focal Ratio (FR). The FR is about how much light you're letting in, the FL is about magnification.

And it's magnification that is important in solar system imaging.

What is the focal length of your C11? About 2500mm or more?
Reply With Quote
  #6  
Old 21-07-2005, 08:12 AM
Striker's Avatar
Striker (Tony)
Whats visual Astronomy

Striker is offline
 
Join Date: Dec 2004
Location: Brisbane
Posts: 5,062
2800mm......Mike...done I will remember
Reply With Quote
  #7  
Old 21-07-2005, 08:35 AM
h0ughy's Avatar
h0ughy (David)
Moderator

h0ughy is offline
 
Join Date: Apr 2005
Location: NEWCASTLE NSW Australia
Posts: 33,426
nice stuff there guys, tony for your image, and mike for your processing!
Reply With Quote
  #8  
Old 21-07-2005, 10:26 AM
ving's Avatar
ving (David)
~Dust bunny breeder~

ving is offline
 
Join Date: Nov 2004
Location: The town of campbells
Posts: 12,359
nice one tony... ya gunna have to learn processing next huh?
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 05:32 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement