Re: [APML]: Agfa 50 for Astrophotography

[mark.kaye@sympatico.ca]

>I had Agfa Ultra 50 speed film in my Mamyia (for daylight shots)  and
>decided to use up the roll and take some piggyback shots this weekend.  I
>used the standard 80mm f/2.8 lens.  I knew that with 50 speed film exposures
>would need to be quite long, even at f/2.8 so I shot wide open for up to 30
>minutes. 

   I do not find this too surprising.  I expose E100SW for 32 minutes at 
f2.8, so by that rule, you should expose it for an hour.  I have used RSX100 
and for 32 minutes and the slides were a bit underexposed.  First impressions 
of the colour balance were that the RSX would be better, the background was 
blue rather than green, however the red response did not seem anywhere near 
as nice as the E100SW. 
   Clear skies!
               MK

http://www3.sympatico.ca/mark.kaye/