Re: [APML] H-Alpha Filter - which brand to buy?

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

John, this is exactly what I needed to know - the dark red filter I have
made an improvement for sure but it was much more subtle than I expected
and not at all what I see when folks post "H-Alpha" shots. I guess it is
Lumicon and step rings. Ah well, that is why I have a job, so I can pay
for the more expensive solution when I have to. Thanks!
Stuart

John Lanoue wrote:

 > Hi Stuart,
 >
 > I tried the kenko r64 filter for Ha photography... want a 58mm filter
 > for free?  I wasn't happy with the results at all.  I also own an 82mm
 > lumicon Ha filter and every step ring imagineable, the difference
 > between the two, IMHO, is night and day.  Two weeks back I shot NGC7K
 > with my lumicon filter under heavy moonlight and while the photo was
 > not a keeper (due to some field rotation creeping in), the density on
 > the tech pan was sweet, much more depth and contrast than I would have
 > expected due to all the moonlight.  I've shot with the R64 filter
 > under moonless skies and not gotten anywhere near as good results.
 >
 > Just my $0.02...
 >
 > john
 >
 >
 >
 > John Lanoue
 > Principal Software Engineer
 > Bedford, NH
 > http://www.geocities.com/johnlanoue/
 >
 >
 >> From: Stuart Heggie <stuart.j.heggie@sympatico.ca>
 >> Reply-To: Discussion of Film Astrophotography <astro-photo@seds.org>
 >> To: Discussion of Film Astrophotography <astro-photo@seds.org>
 >> Subject: [APML] H-Alpha Filter - which brand to buy?
 >> Date: Sat, 18 Oct 2003 18:19:05 -0400
 >>
 >> Hi all - if I want to buy an H-Alpha filter for my Nikkors and I want
 >> the max flexibility, I think I will want a 72mm front filter for my
 >> 180mm ED lens and a step ring to bring it down to the 52mm of my 105,
 >> 50 and 24mm lenses. Hoping the tech pan team knows the answer.
 >>
 >> Kenko R64 comes in 52mm and 72mm for $26.95 and $53.95 USD
 >> respectively. I am suspicious that they are not true H-Alpha filters
 >> but rather plain red filters that they advertise as being
 >> "h-alpha-like". These are the only H-Alpha filters on the Hutech site
 >> that I can find.
 >>
 >> Lumicon makes theirs in the weirdest sizes meaning I'd need two step
 >> rings - their 77mm filter is $89.95 USD - I could buy both Kenko
 >> filters for less and skip the step rings entirely.But! maybe these
 >> are "real" h-alpha filters not just red filters?
 >>
 >> Right now I'm using a dark red filter I have from my B&W daytime film
 >> days (wanna be artiste you know). Maybe I've got what I need already?
 >> Mind, it is a 49mm for my Minolta camera so I had to step it up to 52mm.
 >>
 >> Help?
 >> Stuart
 >>
 >>
 >>
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