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Re: Astrophotos with ZS66SD

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  • williamopticsmarketing
    ... Well done Patrick!
    Message 1 of 3 , Mar 22, 2006
      --- In William-Optics@yahoogroups.com, "patrickstonge2000"
      <patrick.st-onge.1@...> wrote:
      >
      Well done Patrick!

      > http://www.sergestonge.com/astronomie.htm
      >
      > --- In William-Optics@yahoogroups.com, "patrickstonge2000"
      > <patrick.st-onge.1@> wrote:
      > >
      > > Hello,
      > >
      > > www.sergestonge.com/astronomie.htm
      > >
      > > I took these photos with my great ZS66SD with a F/3.3 reducer
      > spaced
      > > to get an 0.56x reduction to 218mm f/l. The camera is a DSI PRO.
      > >
      > > They are all 1 hour taken in 15sec subframes. It was the 7 march,
      > with
      > > a 8 days Moon.
      > >
      > > I'm really happy with this scope. The focuser is perfect, a lot
      > better
      > > than the focuser of my Orion 80ED. I did a side by side test on
      > Saturn
      > > and the Moon, the two scope performed near the same, but the
      > contrast
      > > of the 66SD is a little better. In focus, I see no CA, but inside
      > and
      > > outside focus I can easily see colors, I don't see any colors with
      > the
      > > 80ED. The 66SD have another inconvenient, the field is not really
      > > flat, less flat than the 80ED, a fiels flattener would be really
      > great.
      > >
      > > I confirmed all this in daylight viewing, the contrast is better
      > with
      > > the 66SD, but in my photography, there is CA in the background,
      > but I
      > > have to push up the saturation to really see it.
      > >
      > > Finally, the 66SD weight half the 80ED, and it takes 2 times less
      > > space to transport, the 66SD win easily.
      > >
      > > Patrick St-Onge
      > >
      >
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