Re: [APML] Deep Sky Filters for colour photography

[Stuart Heggie <stuart.j.heggie@sympatico.ca>]

So... okay with my 50 and 105 with step rings and if necessary on my 180? Sounds
reassuring. Thanks Jim.
Stuart

Jim Ives wrote:

> The test they had in S&T showed that the interference filters start not
> working around 28mm.  The light cone coming in is too steep
> ----- Original Message -----
> From: "Stuart Heggie" <stuart.j.heggie@sympatico.ca>
> To: "Jerry Lodriguss" <jerry@astropix.com>
> Cc: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> Sent: Sunday, February 16, 2003 10:12 PM
> Subject: Re: [APML] Deep Sky Filters for colour photography
>
> > Jerry, your comment about wide angle lenses rings a faint bell. I'm not
> suffering
> > much at all on my 180mm lens and really had it in mind for my 50 and 24 mm
> lenses.
> > If it won't work for them, perhaps I'm barking up the wrong tree. Which
> lenses
> > should I expect it to work on?
> > Thanks,
> > Stuart
> >
> > Jerry Lodriguss wrote:
> >
> > > Lumicon seems to be out of business right now, they may come back
> though.
> > >
> > > I have both the Lumicon and Hutech IDAS filters and they both work ok.
> The
> > > color balance is better with the IDAS but you can correct any color
> casts
> > > in Photoshop.
> > >
> > > The filters are interference filters and will not work with wide angle
> lenses.
> > >
> > > You can expose about 3x longer with the filter.
> > >
> > > Jerry
> > >
> > > At 09:37 PM 2/16/2003 -0500, you wrote:
> > > >Have not seen anyone mention using Lumicon's deep sky filter
> > > >(been on the list only a few weeks mind). Are there strong
> > > >opinions about this for or against? I would plan to use it
> > > >for my wide angle and up to 180mm lens. Curious about a
> > > >couple of things: how long to extend the exposure; colour
> > > >shifts; other?
> >
> >
> > _______________________________________________
> > Astro-Photo mailing list
> > Astro-Photo@seds.org
> > http://seds.org/mailman/listinfo/astro-photo
> >


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