Re: [APML] For Wei-Hao :) Will a real astrophoto film please stand up.

[Wei-Hao Wang <wang@IfA.Hawaii.Edu>]

Hi Dominic,

These are the ones I used:
http://www.ifa.hawaii.edu/~wang/misc/films.jpg

Now even I'm confused by the film names.

The 800 one you have is 	Centuria Super 800
The 800 one I have is 		Centuria Super 800 Professional
The 400 one you have is		Centuria Super 400
The 400 one I have is		Centuria 400 Professional
There are also (in Japan)	Centuria Pro 400
(http://konicaminolta.jp/products/consumer/film/lineup/cen400_12ex.html)
and				Centuria Portrait 400
(http://konicaminolta.jp/products/consumer/film/lineup/ctp400.html)

Now I hate to figure out the difference between "Super", "Pro",
"400 Pro", or "Pro 400".  I guess "Centuria" is the real keyword.

Wei-Hao



On Sat, 29 May 2004, [iso-8859-1] Dominic Cantin wrote:

> Hi Wei-Hao :)
>  
> Let me know if it's these film that you used ( I scaned these box ) :
>  
> http://astrosurf.com/aurores/centuria_800.jpg
>  
> http://astrosurf.com/aurores/centuria_400.jpg 
>  
> I bought these 2 films this afternoon at a store near my home 
>  
> http://www.japancamera.com/
>  
> I hope it's the good stuff !
>  
> Thanks in advance !
>  
> Dom :) 
> 
> Wei-Hao Wang <wang@IfA.Hawaii.Edu> wrote:
> Hi,
> 
> Thanks to Bobby for refering to my site. In particular, this one
> is by Centuria 800:
> http://www.ifa.hawaii.edu/~wang/gallery/picutres/I2177-2004.htm
> and these two are by Centuria 400:
> http://www.ifa.hawaii.edu/~wang/gallery/picutres/cygnus_tail.htm
> http://www.ifa.hawaii.edu/~wang/gallery/picutres/m16_to_24.htm
> 
> The last two show that Centuria 400 is not only sensitive to H-alpha
> but also has quite good tri-color balance. Bobby is right that 
> Centuria 800 is grainy. Both Centuria 800 and 400 don't have the 
> fat-star problem that E200 has. (Indeed, Provia 400F also has this
> problem.) Earlier I had posted a comparison for E200 and Centuria 800:
> http://www.ifa.hawaii.edu/~wang/misc/E200vsC800.htm
> 
> I didn't hyper either of them. I'm not sure if Centuria 800 is really
> faster than 400. (They may have different reciprocity failure.)
> 
> The Centuria 400 I used to use is actually called Centuria Super 400.
> It's now replaced by Konica with Centuria Professional 400. The later
> one has quite nice results on comets but its H-alpha sensitivity is
> still unknown. I'm waiting for more test results from my Asian friends.
> 
> These Konica films (400, 800) all have 120 format, but only available
> in east Asia. I'm thinking about improting some small amout to US for
> people in this list.
> 
> Cheers,
> 
> Wei-Hao
> 
> ______________________________________________________________________
> Wei-Hao Wang :)
> 
> Institute for Astronomy at University of Hawaii
> 
> Address: Phone: 808-956-9867 
> 2680 Woodlawn Drive Personal Website:
> Honolulu, HI 96822 http://www.ifa.hawaii.edu/~wang
> ______________________________________________________________________
> 
> 
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> ---------------------------------
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