Re: [APML] Esthetical effects filters

Hi Emmanuele !

I use an anti-newton glass to difused only the bright stars. I bought a box of 20 A-N glass. You should take the 6cm X 6cm ones. They fit on most lens , even on my 16mm :) These filters look like this http://membres.lycos.fr/astrolimagne/Images/antin.jpg you should take only the glass with white frame.

For some examples , look near the bottom of this page http://spacew.com/gallery/DominicCantin , I have 5 pictures where I used this filter !

Good luck !

Emmanuele Sordini <vega@bloomingstars.com> wrote:

Hi everybody,
I occasionally run into some widefield piggyback pictures (i.e. no
telescopes involved, only telephoto lenses) which have some pleasing
effects on the stars in them. In particular:

1) Some of them have the brightest stars which are bloated way beyond what
you could expect from their apparent magnitude. What kind of filter is used
to achieve that effect? Perhaps by utilizing what is called a "fog filter"?

2) In some others (but fewer anyway) the brightest stars have many nice
rays/points. Since those rays do not come from a telescope secondary
mirror's spider vanes, what filter is used in this case? Perhaps a n-point
star (n=6, 8...) filter?

I'm all ears...

Thanks in advance and clear skies,
Emmanuele

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