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M8, M20 Hypered Arista EDU 100

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#1 Todd N

Todd N

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Posted 03 August 2019 - 10:35 AM

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Another iteration in my astrophotography pursuit that didn't pan out as well as anticipated; Better than the last time though. Arista 100 has been among the best responses to hypering in my testing.  It's a traditional style film that had a bit of minor grain in test shots; No big deal from my point of view but, as you can see it looks more like an ISO 400 film. I've had the same outcome with hypered Tri-X. My supposition is these modern film formulations are using a combination of large and small halide crystals where the smaller ones of coarse giving a finer overall grain appearance. Modern Tri-X is incredibly fine grained for an ISO 400 film that rivals an ISO 100 film. But, I think the "low light" conditions aren't activating the smaller halides and are left with the bigger crystals only coming into play hence grainy picture. I suspect this hypered film would best be employed with longer focal lengths and brighter deepsky objects.

 

Arista EDU 100

Hypered H2 6psi 52hrs @30C *

Preceded by overnight vacuum

 

HC-110 1/63 dilution

 

Canon Rebel 2000

200mm 1.4x: 280mm f.l. @f4.5

Single 20min. exp.

 

* In my testing with many films(Namely Kodak and Arista) higher heat(40C) is negatively effecting the films producing low contrast. Lowering the temp eliminated this issue. I now have standardize on on temps 30C to 33C.

 

Todd


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