Re: [APML] New Orion Image Using Provia 100F

[Wei-Hao Wang <whwang@gmail.com>]

Hi Wade,

My experience on Provia 400F is that its blue sensitivity is better than its
red sensitivity.  Its color balance is also a little bluish.  I would say E200 
and Provia 400F are the best combination in terms of high R+B sensitiviy.
On the other hand, I do agree that we can explore more on Provia 100F.  
Finer grain is always a big advantage if we can afford the long exposures.
This is why I love Kodak E100S.

Does the image you showed us look just like the slide on a light box?
If yes, perhaps a stronger curve stretch can bring up more faint nebulas.
This is the case for E100S.  An hour of exposure at F5 with 1-stop pushing
doesn't show many faint nebulas on the slide.  But after a 16bit scan and 
some good curve work, the nebulas do show up nicely with fairly good S/N.
I suppose Proia 100F can do the same.

Anyway, this is a beautiful picture.  It may not be very deep, but its color
and framing do look good.  I feel like I'm watching Orion through my own 
eyes or reading a story about Orion.  This image makes me feel very
comfortable and I don't mind watching it again and again.

Cheers,

Wei-Hao

ps, Before you go on to the Orion mosaic, how about a mosaic of the 
Milky Way?  Since its much brighter, 1.5 hr on Provia 100F should be
pretty enough.


On Sun, 27 Mar 2005 00:45:11 -0800, Thomas W. Earle <twade@bmi.net> wrote:
>  
> Dominic, 
>   
> Provia 100F has better blue response than Provia 400F so it would be an
> excellent choice to combine with Provia 400F if there's a blue reflection
> nebula (e.g. the Witchhead) in the field of view.  In fact, I plan on using
> Kodak E200 and Provia 100F, the best of both worlds, this upcoming Winter
> for my Orion mosaic, assuming Mother Nature cooperates. 
>   
> Wade 
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> 
> 
> 


-- 
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Wei-Hao Wang  :)

Institute for Astronomy at University of Hawaii

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