RE: Konica exposure with 29

["Michael Dziak" <fetch_the_ball@xxxxxxxxxxxxxxx>]

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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