Re: [APML] Blue Hue

["Michael Barlow" <mikeba@rochester.rr.com>]

   D'ho!  That's what it was, the -V filter. Thanks!
Michael A. Barlow

----- Original Message ----- 
From: "steve banbury" <banburys@sonic.net>
To: "Michael Barlow" <mikeba@rochester.rr.com>; "Discussion of Film
Astrophotography" <astro-photo@seds.org>
Sent: Wednesday, March 30, 2005 11:32 AM
Subject: Re: [APML] Blue Hue


> Hi Michael--I've seen posts from a number of folks who used a Minus
> Violet filter in their shots to reduce the haloes.
> There are also some post processing tricks in Photoshop under Filters ,
> Minimum
>
> Good luck--steve
>
> Michael Barlow wrote:
>
> >OM1, E200, St80 Achromatic.
> >1.    I remember there being a "trick" with filters to get rid of the
Blue
> >hue around brighter stars on Refractors but I don't remember how.  Was it
to
> >photograph without a filter and then photograph with a blue filter and
stack
> >them?  Was it to photograph without a filter and stack on top of that one
> >photo of each, red, green, blue where the blue exposure time was far less
> >then the others?  I have the Orion ST80 achromatic and photographed
Mizar,
> >M42, and Sirius, all the bright stars had a blue hue around them.
> >Michael A. Barlow

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