Re: night time infrared photography

[Eckhard Stephan <eckhard.stephan@xxxxxxxx>]

Gavin Wrigley wrote:
> 
> Quick question . . .
> 
> has anyone tried night time infrared photography??  Without a light
> source, any suggestions for exposure or filtration in either black and
> white or colour infrared??
> 

Not sure, what you mean by "without a light source". You definitely need
some light source (electric lights, moon?) to take IR pics. It's a very
popular mistake that IR film could be used for night pics without
further illumination (in the visible or the IR spectrum)...

In typical urban environments where there is a mixture of electric bulbs
(high amounts of IR) and neon lights (almost no IR emission at all), I
use HIE with a Wratten #25 red filter (maybe not really necessary?). I
set my camera's meter to ISO 250 and meter WITHOUT the filter in place.
TTL and through the filter, this roughly equals IS0 1000. The reason for
this procedure is that the light meter of the Minolta Dynax 600si I used
for most of my HIE night shots didn't give consistent results through
the red filter under such low light conditions. 
As usual, "your first film sould be a test roll", and BRACKET (+/- 2
stops on your first film).

Hope that helps,

Eckhard

-- 
========================================
*          Eckhard Stephan             * 
*          Freiburg (Germany)          *
*     eckhard.stephan@xxxxxxxx         *	
*   http://www.eckhards-photobox.de    *   
========================================
*
****
*******
******************************************************
*  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  *
******************************************************