Re: SFX200 ISO Ratings

[Russell J Rosener <rrosener@xxxxxxxxxxxxxxxx>]

Use ISO 200 if you are metering through your camera's lens with a filter
in place. If using a handheld meter and a wratten #25 red filter or
equivalent filter over the lens, set the meter's ASA 2 stops lower, or at
ASA 50. You should have no problem metering through the lens. This film
has very subtle IR effects, so don't expect it to come close to Kodak HIE
or Konica IR 750. It is a good film, even if not a true IR film.

Russ Rosener
 On Fri, 7
Feb 1997, Tony Brintzenhoff wrote:

> Date: Fri, 7 Feb 1997 18:16:40 GMT
> From: Tony Brintzenhoff <brintzen@xxxxxxxxxxxx>
> Reply-To: infrared-photography@xxxxx
> To: rrosener@xxxxxxxxxxxxxxxx
> Subject: SFX200 ISO Ratings
> 
>  
>  Does anyone have any recommendations for adjusting the ISO setting when
> using a #25 red filter,
>  i.e., to achieve "correct" TTL + TTF meter readings in daylight, e.g., 1)
> continue to use ISO 200, 
> 2) use ISO ~1000  (200*4.7), 3) something else? 
> (I know the normal (no filter) rating for the film is ISO 200.)
> 
> Thank you
> 
> Tony Brintzenhoff
> 
> 


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