Re: Overexposed

[Oliver Pettenpaul <topper@xxxxxxxxxxxxxxxx>]

On Wed, 30 Jul 1997 09:42:41 +0200 (MET DST)
Glave Pier Paolo <glave@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

> I finally shot and developed my first IR film (a Kodak HIE), but with great
> disappointment I obtained very dense, overexposed negatives.
> I don't think that any of the negatives will result in acceptable prints, 
> except for 3 or 4 of them, which are, surprisingly enough, rich in the shadows.
> 
> Can anyone of you Sherlock Holmes of IR tell me what could be wrong?
> 
> These are my data:
> 
> - Camera: Ricoh KR-10M with Sigma 28-70 and red filter.
> 
> - Exposition: I tried to expose the film for 50 ASA; as my camera sets on 100
>   by default (without a DX code), I set a +1 compensation.

My first two rolls of HIE are waiting in the freezer for better
weather... Obviously I'm not an expert on this subject but I can guess
what went wrong...
1) You set your camera to 50 ASA and metered through the red filter ??
   The 50 ASA setting includes a correction for a red filter (something
   like a 25,29...) so you should meter without the filter in place with
   the 50 ASA setting.
2) The HIE records more light (in the IR spectrum of course...) than the
   meter of your camera and our eyes might be aware of. With my first
   roll of any IR-film I try to get a starting point for ASA settings on
   my camera. My plans for HIE: Set the meter to 200 ASA. Meter throught
   Heliopan #29. Bracket +1,0,-1,-2. (Scenery with lot of reflected
   IR-light). Check the results...
   The resulting ASA settings should change with other cameras (or any
   other meter), the scenery (amount of reflected IR) and the time of
   year.

So much for the exposure...

Cheers, Oliver


*
****
*******
******************************************************
*  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  *
******************************************************

------------------------------