#1  
Old 14-04-2007, 07:11 AM
Argonavis's Avatar
Argonavis (William)
E pur si muove

Argonavis is offline
 
Join Date: Feb 2005
Location: Brisbane
Posts: 738
Pinhole camera tutorial

http://www.smh.com.au/multimedia/200...oto/index.html
Reply With Quote
  #2  
Old 14-04-2007, 07:33 AM
Ingo
Registered User

Ingo is offline
 
Join Date: Apr 2007
Location: Albany, NY
Posts: 559
Thanks, it's a well cheap way of making a new lens for general photography.


Though it must be like F50
Reply With Quote
  #3  
Old 14-04-2007, 08:15 AM
davewaldo's Avatar
davewaldo
SE QLD

davewaldo is offline
 
Join Date: Sep 2006
Location: Australia - Brisbane
Posts: 727
Thanks mate,

Having done this a bit at uni I might just add something. Rather than using the needle to push all the way through to make the hole I found that you could get a far better quality hole by just making a dent with the needle, then using fine sand paper from the other side sand the dent until a hole is made. By doing it this way you have far more control over the size of the hole and also usually this technique gives a more round hole. It also makes the tin as thin as possible at the hole edge (important for minimising diffraction)

There are also ratios of hole diameter to sensor/film size which can be found on the net. A hole too small and you will get too much diffraction, too big and it will be softer than what is possible. I used a fine ruler and a kiddie microscope to check size.

But this all depends on how serious you want to get...

Enjoy,

Dave
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 02:54 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Advertisement
Celestron RASA
Advertisement
EQ8-R
Advertisement
Star Adventurer
Advertisement
Astromechanics
Advertisement
Bintel
Advertisement
Testar
Advertisement
Lunatico Astronomical
Advertisement
Astronomy and Electronics Centre
Advertisement