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Old 29-12-2018, 09:48 AM
Granada
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ASCOM SkyWatcher Telescope Properties

I've got a SkyWatcher 120 BD ED Doublet Refractor that I connect to my PC using ASCOM. I've entered all the properties data correctly, but I'm not sure what my 'Obstruction (mm)' is -- see attached screenshot. It's 75 by default. Any ideas?
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Old 29-12-2018, 10:16 AM
Huey (Michael)
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Obstruction

Since it has something to do with the optics I'd guess it refers to the central obstruction of a SCT or Mak. Yours is a refractor and does not have an obstruction. Nothing to worry about. Enter 00 if you can.

Hope this helps.

Huey
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Old 29-12-2018, 10:17 AM
Karlzburg (Karl)
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I believe that's if you have a Cas, SCT and RC. Pretty muh anything with a secondary mirror.
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Old 29-12-2018, 10:20 AM
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Merlin66 (Ken)
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Yeah,
Just reset it to 00.
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Old 29-12-2018, 10:33 AM
Granada
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Great, thanks everyone. I'll set it to zero then
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