Re: [APML] Diffraction spikes with a refractor

[steve banbury <banburys@sonic.net>]

Hi John---I really like your diffraction effect very much!!
I tried a similar thing using a Cokin filter adapter  with a Star 4 filter
attached to my TeleVue Oracle.  I was trying to optimize focus, and hadn't
planned on leaving it in place. When I took the filter off, the focus shifted
due to removing the glass of the filter.
Ooops! (Slow learner here!)

SteveB

John Boudreau wrote:

A couple of weeks ago I cobbled up a wire mask for my TV85 to make diffraction
spikes on the brighter stars in an image. I had recalled John Gleason doing the
same thing with a AP refractor a year or two ago. I believed he used heavy
fishing line.

snip


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