Welcome to Astronomy & Telescope Astronomy

 
 

  Modules

· Home
· AvantGo
· Content
· Downloads
· Encyclopedia
· FAQ
· Feedback
· Forums
· Journal
· Members List
· Private Messages
· Recommend Us
· Reviews
· Search
· Statistics
· Stories Archive
· Submit News
· Surveys
· Top 10
· Topics
· Web Links
· Your Account
 

  Who's Online

There are currently, 6 guest(s) and 0 member(s) that are online.

You are Anonymous user. You can register for free by clicking here
 

  Search



 

  Languages

Select Interface Language:

 

  Random Headlines


Astrophotographer
[ Astrophotographer ]

·Astronomy: Astrophotographer - KEEPING RECORDS
·Astronomy: Astrophotographer - Film-FAST FILMS
·Astronomy: Astrophotographer - CAMERAS
·Astronomy: Astrophotographer - BECOMING AN ASTRO PHOTOGRAPHER
 

 
  Jupiter: Astronomy: Jupiter - Photograph-JOVIAN PHOTOS
Posted on Thursday, December 02 @ 14:52:48 CST by astronomy
 
 
  Jupiter

JOVIAN PHOTOS

For a planet whose brightness averages magnitude —2.5 (exceeded only by Venus), Jupiter can be surprisingly difficult to photograph well. Its small size demands the use of eyepiece projection and exposures of several seconds, during which seeing conditions may blur fine details.



Jupiter's limb is significantly darker than the center of its disk. While this is not obvious to the eye, it is readily detected on film. In images processed for high contrast (to reveal belt and zone details), the limb regions can darken and merge with the sky background.

Astrophotographers resort to a few darkroom tricks to get around this difficulty. One way is to expose a print for the limb regions and burn in (give more exposure to) the center of the disk—or inversely, hold back the limb by using dodging (reducing the exposure). Another trick is to sandwich the negative with a slightly out-of-focus positive image. This "unsharp mask" can reveal wonderful details.

While many beautiful color photos of Jupiter have been taken, most planet photographers prefer to use black-and-white film, usually Kodak's Technical Pan. It offers fine grain, good contrast control, and costs less than color. With an f-ratio of about f/60, try exposures of 1, 2, and 4 seconds.

Many astrophotographers are now switching to CCDs, despite the high initial costs . The main reason is that electronic imaging affords greater flexibility in processing. Software offers unsharp masking and many other enhancements, all at the click of a mouse.

 
 
  Login

Nickname

Password

Don't have an account yet? You can create one. As a registered user you have some advantages like theme manager, comments configuration and post comments with your name.
 

  Related Links

· More about Jupiter
· News by astronomy


Most read story about Jupiter:
Astronomy: Jupiter - OCCULTATIONS OF JUPITER

 

  Article Rating

Average Score: 0
Votes: 0

Please take a second and vote for this article:

Excellent
Very Good
Good
Regular
Bad

 

  Options


 Printer Friendly Printer Friendly

 Send to a Friend Send to a Friend

 

 
 
Associated Topics

Jupiter
 
 


 
 
"Login" | Login/Create an Account | 0 comments
The comments are owned by the poster. We aren't responsible for their content.
 
 


 
 
No Comments Allowed for Anonymous, please register
 
 


 
  Astronomy & Telescope Astronomy

All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest © 2004 by Astronomy & Telescope Astronomy
You can syndicate our news using the file backend.php or ultramode.txt