RE: Re: [APML] Color Negative Films

["Franklin A. Holub" <lists@my-spot.com>]

All of this is making sence to me now. In July I shot M16 from a nice dark site. It was a 30 minute exposure on unhypered Royal Gold 400, which at the time I thought was basically the same as Surpa 400, I was baffled as to why this 30 minute exposure was so much less dense then a 12 minute exposure on Supra 400 with the same setup in similar conditions. I bet that the "latest short red spectral sensitivity technology" explains at least a part of it. My order for a case of Supra 400 is going in today...

Frank
http://www.my-spot.com

----- Original Message ----- 
  
Interesting. Thanks for the information, Anders.

I just did a search on Kodak's site, and unfortunately the news is not good as far as the red spectral peak of these new films. Here's a press release from a few days ago: 
http://www.kodak.com/UK/en/corp/press/archive/2002/20020803.shtml

Of particular interest to all of us is the paragraph:
"The new Royal Supra 200 and 400 colour print films incorporate the latest short red spectral sensitivity technology and advanced colour management technology to deliver accurate skin tones and improved sharpness."

It goes on to say:
"The new films also feature improved colour consistency over a wide range of exposures. Kodak incorporated short red spectral sensitivity and advanced colour management technology to the new Royal Supra 200 and 400 films to optimise accurate skin tone reproduction over a wide range of flesh tones."

These are essentially the same changes Fuji did which killed the 656nm recording power of their negative films. And while it's been mentioned here on APML that the problem isn't as bad with the new RG200, I'll hold off until I see some actual sky results from it on emission nebulae.


John Boudreau
jeboud@attbi.com
http://home.attbi.com/~jeboud/astro.htm


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