Re: [APML] Print films for AP

["Jim Janusz" <jjanusz@dc.rr.com>]

I have just noticed a film sold by Freestyle www.frestylephoto.biz  It is
called Maco Cube 400, available in 35mm and 120.  They quote spectral
sensitivity to from 400nm to 730nm which is beyond TP which stops at 700nm.

Direct link to the 120 size
http://www.freestylephoto.biz/sc_prod.php?cat_id=403&pid=4676

This film seems to have promise if anyone would like to test it.  I will by
summer but my schedule is full right now.

Jim


----- Original Message -----
From: "John C. Mirtle" <jmirtle@shaw.ca>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Thursday, March 20, 2003 10:54 PM
Subject: Re: [APML] Print films for AP


> Nicola,
>     You might want to stay with the E200 or Provia. I have shot some B/W
> (Tri-X), have a look at http://members.shaw.ca/john.mirtle/files/m78.jpg .
> It was taken with a cold camera, for 30 minutes at f11 on a C14. This is a
> full-frame scan, you can see how grainy Tri-X is when processed in D-19.
One
> BIG problem with Tri-X is that it has no sensitivity to H-alpha. This
means
> that it is no good for tri-colour.
>     By far the best B/W for tri-color is tech pan, and it must be hypered.
I
> have done a few shots using Wratten filters for colour separation, and
even
> with a Schmidt camera at f1.5, exposure times for 2 filters are an hour or
> more. At f3 you need to quadruple the exposure times, I'm sure you can do
> the math! Another option for tri-color at slower f-ratios is custom
filters
> with higher throughput, Chuck has some experience with this. They cost a
bit
> though.
>     Tri-colour is tough, but the results are awesome. Not too many people
> are doing it, but check out web sites of Loke Tan, Chuck Vaughn, Chris
Schur
> and the Schmidt pages on my web site. You really do want to think twice
> about this! E200 and Provia are a lot easier....
>
> John Mirtle
> Calgary, Ab. Canada
> http://members.shaw.ca/jmirtle
>
> ----- Original Message -----
>
> Don,
>
> I had a look at Robert Reeves' page, and he mentions Ilford HP5+ as a good
> candidate, but actually I didn't see any of you using it. Well, in reality
> since I subscribed to APML I can't recall of any B&W picture, but I might
be
> wrong.
> For the people using negatives, after supra 400 passed away, it could be a
> good time to turn back to B&W and tricolor photography...but this is only
a
> guess as I never used (up to now) B&W myself.
>
> Is there any tri-color film astrophotography homepage that I could look to
> get hints of where to start (for instance, which filters for LRGB? How
much
> should I expose each color? and so on...)
>
> Regards,
> Nicola
> http://astrofoto.laza.it
>
>
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