Re: Konica exposure with 29

[JL <jql7285@xxxxxxxxxxx>]

To add further confusion, (or perhaps simplify things), I've been using
Konica 120 in my Diana. No ASA, nothing to calculate! I do use a small
red filter of unknown origin scotch-taped over the lens, which gives the
effect I'm looking for. Haven't quite figured out the best developing
times yet. If anyone else has tried this, let me know.

Jackie

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
> 
> ----------
> From:   owner-infrared@xxxxx on behalf of GMA
> Sent:   Thursday, September 11, 1997 12:28 PM
> To:     infrared@xxxxx
> Subject:        Re: Konica exposure with 29
> 
> George L Smyth wrote:
> >
> > I expose Konica IR at EI 8 when metered through the filter (examples on my
> Web
> > page).  TMax developer will certainly work, but I can't help here as I use
> Rodinal.
> >
> > george
> ________________________________________________
> >
> >hannu.jarventaus wrote:
> >I have B+W 091 filter, which should be equivalent to #29.
> >For Konica IR film with this filter I use EI 100 metered through
> >the filter and lens with cameras own meter.
> >
> >The film can be developed in TMAX (normal 1+4 dilution)
> >5 minutes at 20C temperature.
> ________________________________________________
> 
> George says EI 8; Hannu says EI 100 !!!???  No wonder IR photography is
> confusing!!
> 
> As I recall, the Konica's rated speed is 12.  So I can't mathematically
> come up with these EIs, unless they rate it at 12 assuming the 3-stop
> filter is attached, then 100 works.
> 
> Can anybody un-confuse me??
> 
> Thanks
> --
> 
> george  :>)
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