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Will the fact that the red falls off sooner have much of an impact on
photographing various nebulae?
I will be taking pictures through a Meade 12" LX200 and a Takahashi FCT-150
triplet flourite Apochromatic refractor, as well as piggyback on the
LX200. I also have time on a C14 using an Apogee AP6E camera. Should
be lots of fun in New Mexico.
The prestige is printed on the box, so it may not really be part of the
official name.
Walter Willis
Life without chocolate is too terrible to
contemplate
----- Original Message -----
Sent: Monday, August 25, 2003 1:40
PM
Subject: Re: [APML] Agfa Optima Prestige
film
Walter,
I haven't tested the new Agfa Optima 400 film
(just heard about it by your post. The Agfa site has a data sheet, dated
May 2003 for the Optima 400 that shows reduced red response compared to the
old Optima II 400 film (see my test results from April 2002 at: http://home.nethere.net/mpd/FilmTestData/AgfaOII.htm ).
Hypering the old film helped the green and blue, but did little for the
red. The new film data sheet shows higher red sensitivity at around
610-620 nm and a steep decline in sensitivity for wavelengths longer than 650
nm (the old film had its steep decline longer than 660, Halpha is 654
nm). This is consistent with Kodak and Fuji reworking all their color
negative films to peak at shorter red wavelengths to "improve" color photos -
mostly skin tones. I guess they don't like blushing cheeks.
Anyway, thanks for letting us know about the new
Agfa film. One question though: I couldn't find any mention on the Agfa
site of Optima Prestige film. Let us know how this works for you this
weekend.
Don
At the recommendation of the manager of the camera shop where I get my
pictures developed, I am going to try Agfa Optima Prestige film. I
asked him about film that had good red response. I picked up 4
rolls of ISA 400 and will try this weekend while I am in New Mexico.
Has anyone here used this film? What were your impressions?
Thanks.
Walter Willis
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