Skywatcher 200PDS focus

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Skywatcher 200PDS focus

Postby diver999 » Sat Dec 26, 2015 12:13 am

Hi All, first post here.

I just set up a new to me Skywatcher 200PDS that I recently bought second hand.

It has a 2" focuser & the 2", 28mm eyepiece that seems to be supplied as standard. It does look like the pictures I found on-line & I've added a picture below.

However, I can't get the thing to focus without pulling the eyepiece almost out of the focuser. It seems as though I'm missing a tube that would go between the focuser & the eyepiece. There is a short adaptor that screws into the focusser & then has the two screws at 90 degrees to hold the eyepiece. It looks perfectly standard.

Any ideas if I'm missing a tube, or anything else that could be wrong.
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Re: Skywatcher 200PDS focus

Postby The Man with the Corrugated Iron Roof » Sun Dec 27, 2015 12:20 am

The short adaptor is a star diagonal and, yes, you will need to with most eyepieces. It is more comfortable to use than the straight through viewing position, especially for objects high in the sky.

Many astronomers who like to take photographs (including me) prefer to remove the star diagonal, as it adds more to the light path and can cause dust or blemishes to appear in the final results.

However, for visual use, most people prefer to use the star diagonal.
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