Re: Development or Exposure?

[Eckhard Stephan <eckhard.stephan@xxxxxxxxxxx>]

Martin Gebhardt wrote:
> 
> Hi there,
> 
> My latest roll of HIE (acually the first one I developed myself) turned
> out much better than the first one. No fogging this time, but still, the
> film is very dense. 

HIE negs might be A LITTLE more dense than normal b&w negs. With my
condensor enlarger, I often have to print them about one stop slower
than standard bw. 
> 
> I took my pictures on a sunny morning (itīs winter here!) in a
> greenhouse with my FM2. ASA setting was 800 and I metered through the
> lens with a #29 dark red filter in front of it. Should have been 1 or 2
> stops less???

ASA 800 sounds rather fast. For daylight shots with a Wratten #29, I
usually set my camera's lightmeter to ISO 320 (dev. in D-76 (stock), 20
°C / 68 °F, 11 min.). BTW, If you are not 100% sure about the correct
exposure for a special situation, you should always bracket over at
least +/- one stop. 

A greenhouse might hold some "traps" for IR-photographers: 1.) If you
meter from dark green leaves, your TTL meter, which only records visible
light, will indicate a long exposure time. Leaves, however, are strong
IR-reflectors. You are very likely to get overexposed pics...
2.)Just an idea: Were there any electric bulbs in the greenhouse? If
yes, this might also partially explain your results: Electric bulbs emit
a lot of IR radiation - which is of course recorded by HIE, but not by
your light meter... 
> 
> For development I used Tetenal Ultrafin 1+20, 17 minutes. I computed
> this based on D-76 development times by Laurie White compared with how
> D-76 and Ultrafin are used with Delta 400. What do you think?

Probably too long. John Mided's "Massive Dev Chart"
(http://www.digitaltruth.com), usually a very reliable source of
information, recommends 13 min. 
> 
> 

Greetings,

Eckhard 

-- 
========================================
*          Eckhard Stephan             * 
*          Freiburg (Germany)          *
*     eckhard.stephan@xxxxxxxxxxx      *	
*   http://www.eckhards-photobox.de    *   
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