A Photography forum. PhotoBanter.com

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » PhotoBanter.com forum » Photo Equipment » 35mm Photo Equipment
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Going the distance - Pinhole Cameras



 
 
Thread Tools Display Modes
  #1  
Old October 3rd 04, 10:29 PM
Alan Browne
external usenet poster
 
Posts: n/a
Default Going the distance - Pinhole Cameras



Press Association
Sun 3 Oct 2004
9:50am (UK)
NASA Hopes to Build 'Giant Pinhole Camera'

By John von Radowitz, Science Correspondent, PA News.

Scientists hope to build a giant “pinhole camera” in space to spot planets
orbiting distant stars.

The New Worlds Imager would be the size of a football field with a 30ft wide
hole in the centre.

Essentially it would work in the same way as a simple camera made from a box
with a pinhole in one end.

Light entering the pinhole forms an image on photographic film at the far end of
the box.

A sharp image is possible because the pinhole prevents interference by scattered
rays of light.

In the same way the New World Imager would act as a “starshade”, cutting out
scattered light so that planets can become visible.

A spacecraft equipped with a telescope would trail tens of thousands of miles
behind the starshade to collect and process the light.

The system, under investigation by the US space agency Nasa, could theoretically
detect planets as small as the Earth’s Moon and search for indicators of life
such as methane, water, oxygen and ozone.

Professor Webster Cash, from the University of Colorado at Boulder, who put
forward the proposal, said: “In its most advanced form, the New Worlds Imager
would be able to capture actual pictures of planets as far away as 100
light-years, showing oceans, continents, polar caps and cloud banks.

“To me, one of the most interesting challenges in space astronomy today is the
detection of exo-solar planets.

“We have created an affordable concept with very practical technology that would
allow us to conduct planet imaging in visible and other wavelengths of light.”

The idea was one of 12 suggestions selected for funding by the Nasa Institute
for Advanced Concepts.

Others included proposals for a lunar space elevator, super-conducting magnet
technology for astronaut radiation protection, and a magnetised beam plasma
propulsion system.

http://news.scotsman.com/latest.cfm?id=3577737

--
"There is no such thing as inaccuracy in a photograph.
All photographs are accurate. None of them is the truth."
-Richard Avedon
-- rec.photo.equipment.35mm user resource:
-- http://www.aliasimages.com/rpe35mmur.htm
-- e-meil: there's no such thing as a FreeLunch.--
  #2  
Old October 4th 04, 07:30 PM
external usenet poster
 
Posts: n/a
Default


Alan Browne wrote:
NASA Hopes to Build 'Giant Pinhole Camera'
(snipped)
================================

I never thought a camera with a 30 ft. hole would be considered a
pinhole camera, but then I've never thought about one being the size of
a football field. I wonder what ISO film they will use. I also wonder
just how big the film will be.


Cody,

http://community-2.webtv.net/AnOverc...otographyLinks

  #4  
Old October 6th 04, 02:00 AM
external usenet poster
 
Posts: n/a
Default


(st3ph3nm) wrote:
LOL! I imagine it'd be digital. I could be wrong. Imagine the order:
"G'day mate, I'm looking for a digital back for my pinhole camera. Needs
to be about the size of a footy field."
Cheers,
Steve
================================

The article said film. I guess film aint dead after all. Annika1980 says
film is dead, but he thinks Jesus is dead, what does he know?

"Essentially it would work in the same way as a simple camera made from
a box with a pinhole in one end.
Light entering the pinhole forms an image on photographic film at the
far end of the box".



Cody,

http://community-2.webtv.net/AnOverc...otographyLinks

 




Thread Tools
Display Modes

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

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Best Price on Digital Cameras. Joe Walsh In The Darkroom 0 August 18th 04 09:52 AM
Best Price on Digital Cameras. Joe Walsh Digital Photography 0 August 18th 04 09:52 AM
swing lens cameras and focussing distance RolandRB Medium Format Photography Equipment 30 June 21st 04 05:12 AM
Digital cameras hold value? Stacey Medium Format Photography Equipment 96 March 9th 04 02:19 PM
Which is better? digital cameras or older crappy cameras thatuse film? Michael Weinstein, M.D. In The Darkroom 13 January 24th 04 10:51 PM


All times are GMT +1. The time now is 06:13 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 PhotoBanter.com.
The comments are property of their posters.