Re: Konica exposure with 29

[GMA <george@xxxxxxxxxxxxx>]

George L Smyth wrote:
> 
> GMA wrote:
> >
> > Michael Dziak wrote:
> > >
> > > Yes I can clear up the confusion.  George's recomendation is most likely with
> > > a incident hand held meter.  Hannu's is with through the lens metering with
> > > the filter in place.   Deep red filters can vastly distort the accurarcy of
> > > TTL metering depending on the spectural response of the particular camera's
> > > meter.  What is someones recomendation for a Nikon , may not be accurate for a
> > > Canon, or  even another style of Nikon.  The film data sheets suggests an EI
> > > {exposure index} of 12 with this film.  that would give you an exposure of
> > > F16@x/12second in bright daylight.  Therefore my recomendation of F16 at 1/15s
> > > with a bracket of F16@x/8s to cover for the maxium of when in doubt with
> > > negative film, overexpose.  And with infrared your always in doubt.
> > > Mike Dziak
> > >
> >
> > --
> > So, you're saying the recommended EI is 12 and this ASSUMES the use of
> > the red filter??  I.e, f/16 1/15 with filter on??
> >
> > george  :>)
> 
> The documentation that came with the film states:
> 
> "The standard exposure conditions for Konica Infrared 750 file are as follows:
>   With a Kenko R-1 filter, the standard exposure conditions are f5.6 @ 1/60 second
> (bright sun, outdoors).
>   With no filter the speed of the film is equivalent to ISO 32."
> 
> The Kenko R-1 is a red filter.  So, if you do a little math, with the filter we are
> talking about EI 8 and without the filter EI 32.
> 
> george
> 
> --
 
Thanks, george, I see the light now! And, you do have some incredible
work on your site.

Thanks again.
- -- 


george  :>)
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