Re: [APML] Lumicons film + development time

[KGKIRKLEY@aol.com]

In a message dated 3/17/02 10:19:21 PM, roland@astrofoto.org writes:

>Anyone here who still buys hypered TP from Lumicon or has everyone
>moved on to having their own hypering rig?  Obviously, experimenting
>is a good rule of thumb, but I'd like to start out which something
>that is close to what I ought to do since (1) getting out of town is a
>prerequisite for shooting since I live in NYC, and (2) I'm
>impatient---did I mention I live in NYC :-)
>
>I'm guessing that 10 minutes is probably okay given what I've heard
>here, but can anyone move that beyond a guess for me?
>
>roland

Roland:
Some people process Tech Pan in D-19 for 4 minutes (68 degrees) and some 10 
minutes. Those that use 10 minutes are usually trying to squeeze every last 
drop of image from the film. They are usually shooting very dim objects with 
relatively slow optical systems (f7, 8, 9, 10....) or using an H Alpha 
filter. Those that use 4, 5, 6, 7 minutes are usually using faster optical 
systems (f1.5, 2, 4, 5, up to 6) or brighter objects.

Yes, running tests is the only way to determine what is right for your system.

Kent Kirkley

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