Re: Konica exposure with 29

[George L Smyth <GLSmyth@xxxxxxx>]

GMA wrote:
> 
> 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??

Konica's suggested time when shooting without a filter is EI 32.  My suggestion of EI
8 when metered through a #25 or #29 filter comes from experience.  You will
occasionally see posts complaining about the contrast of Konica IR and I experienced
this when I started using it.  I decided to lower this contrast by increasing the
exposure and reducing the development, which has worked wonderfully for me.  Examples
can be seen on my Web page.  The reason I mention this is that one can go there to
see what I've done and decide if that is the direction they wish to take.  If so,
then my suggestions may work for them.  If it is not the direction they wish to take,
then they can be sure NOT to follow my suggestions. <g>

Remember, as always, your camera and techniques may well vary from mine.  You may
wish to do some testing to see what the film can and cannot do to further your
vision.  Years ago I divided a roll of HIE up and shot a single scene at EI 50, 125,
250, 500 and 1000, varying the development of each segment.  I printed each frame to
a constant contrast (well, I tried, but it just isn't possible) and ended up with a
series that showed me the possibilities HIE offered.  It took two full weekends, but
not only did I save the money of an expensive workshop, but I also had a valuable
roadmap as to how this film could get me from my mind to the printing of my vision. 
I would encourage anyone serious in this realm to do something similar.

george

- -- 
 Handmade Photographic Images     
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