Re: [APML] Film Testing Targets?

[Chris Schur <comets133@yahoo.com>]

The S monoceros region has both blue and reds and is
an excellent test region.

chris schur
--- "Thomas W. Earle" <twade@bmi.net> wrote:

> I hope to venture out Thursday night (10/14), and
> tests several
> medium format films for astrophotography. 
> Basically, I'll be
> looking for two things: how well the film performs
> and how long I
> can expose it at my dark location.  In order to go
> through as many
> rolls as possible, I'll be forced to use the fastest
> Pentax 67
> lenses I own (i.e. 75 mm f/2.8, 105 mm f/2.4, and
> 165 mm f/2.8).
> Since I want be too concerned about aberrations,
> I'll shoot them
> wide open.  The only caveat I see with this approach
> is that it's
> not going to tell me much about reciprocity failure.
>  For example,
> if I find I can shoot 15 minutes at f/2.8 with Fuji
> Provia 400F, I
> cannot assume it applies to 30 minutes at f/4.0. 
> I'll will tests
> the "winning" candidates from the initial study at
> the optimum
> f-stops at a later date.  If time permits, I'll be
> testing the
> following films:
> 
> 	Konica Professional 400
> 	Kodak Ultra 400UC
> 	Fuji NPZ 800
> 	Fuji Provia 400F (pushed 1 stop)
> 	Astia 100F (pushed 2 stops)
> 
> Does anyone have any suggestions on wide field
> targets (i.e. fields
> that contain Oxygen III and H-alpha targets
> together)?
> Unfortunately, at my latitude (i.e. 45 degrees
> North), the Milky Way
> is too low this time of year.  I believe after 200
> AM I'll start
> concentrating on Orion.  Any constellation
> suggestions or target
> areas, especially between 800 PM and 200 AM, would
> be greatly
> appreciated.
> 
> As an aside, Astia 100F, although slow, looks pretty
> intriguing
> given the fact it's red sensitivity peaks near the
> h-alpha
> wavelength.  Has anybody tested this film?  Is it
> worth a test?
> 
> Thanks in advance,
> 
> Wade
> 
> 
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> 



	
		
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