RE: [APML] Fuji Provia 400F and exposure time

["Scott Hammonds" <shammonds@creatorsview.com>]

I agree with Jeff, 60 to 70 minutes works well. As a side note, if memory
serves me, Matt BenDaniel used to shoot at f5.6 for 90 minutes on E200
without pushing the film. His results speak for themselves. I'm just not
sure how much you gain with the additional minutes. Just my .02 worth. 


Scott Hammonds

-----Original Message-----
From: Jeff Ball [mailto:jeffball@astro-photography.com] 
Sent: Tuesday, July 06, 2004 8:21 AM
To: 'Discussion of Film Astrophotography'
Subject: RE: [APML] Fuji Provia 400F and exposure time

Hello Nicola,
I know what you mean about wasting sky time.  About 2 years ago I went with
extended exposures on an f8 system with E200 and Provia.  I had data ranging
from one hour to 105 minutes.  I was imaging at Cherry Springs State Park in
PA which is considered one of the best dark sky spots in the eastern US.  I
found a negligible benefit with exposing longer than 60 minutes.  That is
why I switched to an f6 system.  My advice is to shoot with optics as fast
as you have for no more than 60 minutes, even under dark skies.  Maybe a bit
more than 60, say 70, but I wouldn't waste much more time than that.  One
person's experience...hope it helps.

Best regards,
Jeff Ball
www.earthandskyphoto.com


 

> -----Original Message-----
> From: astro-photo-bounces@seds.org
[mailto:astro-photo-bounces@seds.org]
> On Behalf Of centaurus_a@virgilio.it
> Sent: Tuesday, July 06, 2004 8:02 AM
> To: astro-photo@seds.org
> Subject: [APML] Fuji Provia 400F and exposure time
> 
> Dear all,
> 
> I always sticked to the rule of thumb of the square of the f/ratio for
a
> 400 ASA film, but I was wondering if, on a top of a mountain (1900
meters
> a.s.l.) with clear sky it would be better to push the esposure a bit
more
> of , let's say 1.5 times...especially with Provia 400F which I don't
know
> if it's reciprocity failure is much higher than, for instance, E200.
> Unfortunately I go to this place only once a year and I don't want to 
> "waste"
> time in sky fog testing so I need a good estimate beforehand.
> 
> Any opinions?
> 
> Regards,
> Nicola
> http://astrofoto.laza.it
> 
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo
> 
> ---
> Incoming mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.712 / Virus Database: 468 - Release Date: 6/27/2004
> 

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.712 / Virus Database: 468 - Release Date: 6/27/2004
 

_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo




_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo