Welcome to Astronomy & Telescope Astronomy



· Home
· AvantGo
· Content
· Downloads
· Encyclopedia
· 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, 8 guest(s) and 0 member(s) that are online.

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




Select Interface Language:


  Random Headlines

[ Observer ]

·Astronomy: Observer - Sky-RECORDING THE SKY
·Astronomy: Observer - Site-CHOOSING A SITE
·Astronomy: Observer - GOOD SEEING
·Astronomy: Observer - CLEAR SKIES

  Astrophotographer: Astronomy: Astrophotographer - CAMERAS
Posted on Monday, November 29 @ 01:55:28 CST by astronomy


For casual sky shooting, almost any design of camera will do, but it must have a B (for Bulb) setting for the shutter. This setting holds the shutter open for as long as the shutter button is pressed—an essential feature because most night-sky photos require exposures of several seconds, if not minutes. To hold the button down during these long exposures, you use a locking cable release, which screws into the shutter button.

The drawback of most new cameras is that their shutters are battery-operated. Relying on batteries is risky—they may fail in the cold night air or during long exposures. This is why many astrophotographers seek out mechanical cameras on the secondhand market. (Good models include 35 mm single-lens-reflex, or SLR, cameras such as the Canon FTb and Fl, Nikon FM2 and F3, Olympus OM-1 and OM-4T, and Pentax K-1000 and LX.) It might seem strange to forgo the electronic features that adorn today's cameras, but none of them is needed for astrophotography.

While a close-up of the Moon or a clear image of a faint nebula requires shooting through a telescope, many sky subjects can be captured with standard camera lenses. Lenses that have fixed focal lengths are usually of better quality and faster than zoom lenses. For 35 mm cameras, a set of three fixed lenses is useful: a wide-angle lens (one with a focal length of 24 to 35 mm), a normal lens (50 to 55 mm), and a short telephoto lens (85 to 200 nun). Try to choose fast lenses— these have a maximum aperture of f/2.8 or f/2.

For photographing the night sky, especially with color film, most of the filters employed by photographers and amateur astronomers are of limited value. Broadband LPR, or deep-sky, filters can help darken sky backgrounds but usually shift the color balance to green. A dark red filter will enhance nebulosity when shooting with the favored black-and-white film, Kodak Technical Pan 2415, or Tech Pan.




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 Astrophotographer
· News by astronomy

Most read story about Astrophotographer:
Astronomy: Astrophotographer - KEEPING RECORDS


  Article Rating

Average Score: 0
Votes: 0

Please take a second and vote for this article:

Very Good



 Printer Friendly Printer Friendly

 Send to a Friend Send to a Friend


Associated Topics


"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