[AZ-Observing] Re: Astroimages from Cherry Road
- From: "William R Wood" <w.wood@xxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Tue, 30 Aug 2005 11:10:26 -0700
Tom,
>
> Even attaching the camera to the top of the Pronto was not trivial. I had
> to buy a special piggyback adapter made only by >TeleVue. On top of that
> rides an omni-directional ballhead.
A ballhead is exactly what I would like to use. Could you let me know what
one you have and whether you think it will hold a Canon 1DMkII camera (a
fair amount heavier than the 300D) plus a 70-200/2.8 lens without slipping
or flexing?
>
> One good thing about digital is that you can zoom in a review image
> seconds after you take it to check for focus. The >problem with that
> 70-200mm has been that you are only turning that focus ring back and forth
> by fractions of a millimeter to >affect the focus. This is fine for
> terrestrial work, when the depth of field will take care of that problem,
> but not fine for astro >shots that have to be dead nuts on infinity.
It will be a pain dealing with the wire but I can run the camera tethered to
a laptop via firewire and see the images (full size and zoomed in) right
away which may work out ok for focusing.
The 1D also has a noise reduction setting which works real well to eliminate
the hot pixels that show up in long exposures so I am hoping that the images
will not need much, if any, fussing in Photoshop. Am I dreaming or do I
have to read "Photoshop for Astrophotographers" as well?
Thanks,
Bill
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