Re: [APML] D76 vs D19 development for hypered Tech Pan?

[KGKIRKLEY@aol.com]

In a message dated 3/5/02 10:52:33 AM, roland@astrofoto.org writes:

>Hi,
>
>I'm a newbie as this having taken my first pictures not quite a year
>ago (see, for example, http://www.astrofoto.org/constellations/).
>I've ordered some hypered Tech Pan from Lumicon that I intend to use
>in about two weeks and have a question about developing.
>
>A nearby lab, recommended by a friend who is a professional
>photographer and who does a fair amount of B&W, uses D76 for their B&W
>development rather than D19 which is what seems to be most recommended
>for Tech Pan.  What are the drawbacks to using D76 rather than D19?
>Kodak's web site says 
>
>    Micro-fine or extremely fine grain (depending on developer),
>    extremely high resolving power
>
>It's the "depending on developer" that has me wondering.
>
>roland

Roland:
if you are going to be using Tech Pan for astrophotography, then, in general, 
D-19 is the developer of choice. D-76 is a totally different developer, 
usually used for 'conventional' photography and films. D-19 is a high 
contract developer and D-76 is a much lower contrast, long scale developer. 
D-19 is preferred for deep sky, nebula, galaxy objects. For bright objects 
and objects with large tonal ranges, like the moon or bright nebula (M42), 
D-76 can and is sometimes used.

Kent Kirkley

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