Re: underexposed=no grain???

["Tim Rudman" <tim.rudman@xxxxxxxxxx>]

-----Original Message-----
From: George L Smyth <GLSmyth@xxxxxxx>
To: infrared@xxxxx <infrared@xxxxx>
Date: 10 March 1999 12:29
Subject: Re: underexposed=no grain???


>ZmanPhotog@xxxxxxx wrote:
>>
>> In a message dated 3/10/99 1:29:08 AM, ambersexton@xxxxxxxxxxxxx wrote:
>>
>> <<but if you just
>> underexpose there shouldn't be an increase in grain, but a
>> decrease.>>
>>
>> Wow, not in any of the film I've shot or have seen.
>> Anytime I see any b/w or color negs that are over or under, there is an
>> increase of grain.  And I see plenty of under and over negs (I work with
>> beginning photo students).
>> Anyone else habe an opinion on this?
>
>Years ago I did some testing on HIE.  I exposed at EI 60, 125, 250, 500,
and
>1000 and developed each at seven different times.  I then printed each
negative,
>which gave me a full array of the possibilities of HIE.  I would highly
>recommend anyone looking to learn what this film can do to do just this.
>
>Indeed, when shot at a higher speed, HIE displays higher contrast.  The
>difference in contrast is so dramatic, that the grain size is no longer a
>consideration, as it is overtaken by the contrast.  Shooting slow (EI60)
greatly
>reduces the contrast (an example is "Discovery", in the North Wing of my
Web
>site).
>
>If you really want to work against the grain, shoot HIE at EI500-1000 and
push
>while developing.  Again, doing your own tests are very important, so that
you
>can see for yourself the possibilities with this film.
>
>george


My findings largely mirror George's as far as exposure goes.
The over exposed neg. have a very characteristic appearance with lots of
grain and low contrast, the mid tones moving up into the highlights which
can go a muddy grey. You have to be careful what to use this on as they can
be difficult to print well if highlight separation is important. I think it
can work well though where the image is more impressionistic.
My under dev technique can produce absolutely grainless negs but it too is
only useful for certain types of picture as the neg is so thin and tones
compressed, but it can work well as I described previously. Both approaches
give low contrast negs - but of quite different appearance
Tim

*
****
*******
******************************************************
*  To remove yourself from this list, send:          *
*         UNSUBSCRIBE INFRARED                       *
*       to                                           *
*         MAJORDOMO@xxxxx                            *
*----------------------------------------------------*
*   For the IR-FAQ, IR-Gallery and heaps of links:   *
*  http://www.a1.nl/phomepag/markerink/mainpage.htm  *
******************************************************