Mailinglist Archives:
Infrared
Panorama
Photo-3D
Tech-3D
Sell-3D
MF3D
|
|
| Notice |
|
This mailinglist archive is frozen since May 2001, i.e. it will stay online but will not be updated.
|
|
Re: IR exposure on overcast days
- From: Ian D Wilson <idw@xxxxxxxxxxxxxxx>
- Subject: Re: IR exposure on overcast days
- Date: Thu, 02 Dec 1999 08:56:03 +0000
A rule of thumb I've always used is to assume that IR reduces at half
the rate of visible light in shadow or cloud cover. In other words, if
the visible light reading is 3 stops down from sunny/16, I start the IR
exposure at 1.5 stops down. Not very scientific, I know, but it has
always worked for me!
-- Ian.
--------------------------------------------------------------
Dr Ian D. Wilson | Email: iwilson@xxxxxxxxxxxxxxx
Principal Engineer | WWW: http://www.telemedia.co.uk
Telemedia Systems Ltd. | Tel: +44 (0) 1223-477000
Mount Pleasant House | DDI: +44 (0) 1223-578378
Cambridge CB3 0RN | Fax: +44 (0) 1223-506282
England | Mobile: 0467-473594
--------------------------------------------------------------
*
****
*******
******************************************************
* To remove yourself from this list, send: *
* UNSUBSCRIBE INFRARED *
* to *
* MAJORDOMO@xxxxx *
*----------------------------------------------------*
* For the IR-FAQ, IR-Gallery and heaps of links: *
* http://www.a1.nl/phomepag/markerink/mainpage.htm *
******************************************************
|