Re: question about ISO vs EI (Konica and low light)

[Eckhard Stephan <eckhard.stephan@xxxxxxxx>]

Increasing Konica's film speed under low light conditions might indeed
be a good idea. Recently I did some graveyard shots on Konica. It was a
grey, foggy day, late afternoon. Especially next to larger monuments,
chapels and trees it was quite dark. I shot the film at an EI of 50,
metering through a Wratten #25 (my normal speed). I developed the film
as usual - and got very dense negs, overexposed by at least 1 aperture
stop. The same thing happened to me in a similar situation some months
ago. Maybe there's some difference between IR radiation (almost
exclusively recorded by the Konica film) and visible light (recorded by
the camera's meter). With HIE, I never had problems like these - maybe
due to its panchromatic sensitivity.

Eckhard


Ben Kreunen wrote:
> 
> At 09:12 PM 10/17/2000 -0600, you wrote:
> >Ok, I got the following out of Paduano's book, and I just am puzzled:
> >      "With no filter, Kodak has a suggested ISO of 80, and Konica of 32.
> >With a no. 25 Kodak is 20, Konica is 8.  EI for Kodak is 200, for Konica is
> >50-64, except under low light for Konica use an ISO of 100. "
> 
>  From what you've quoted here, the ISO is metered without a filter (ie. no
> filter on the lens, or handheld light meter) whereas the EI given would be
> metered through the lens WITH the filter on.  Interesting that they suggest
> increasing Konica's speed in low light..  I rate mine at 12 (50 through the
> filter) and don't find any difference between 1/4 sec to 15 minutes. It'd
> be interesting to see what they consider low light to be.
> 
> Cheers
> 
> Ben
> 
> ===========================
> http://www.bigbenpublishing.com.au/
> ===========================
> 
> *
> ****
> *******
> ******************************************************
> *  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  *
> ******************************************************


-- 
========================================
*          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  *
******************************************************