Hi,

> - The second case is the visual work at the eyepiece. Normally one
> would prefer an "Inverted" view and "Alt/Az (zenith up)" here. This is
> the case when you are standing or sitting behind your telescope
> without a diagonal (refractor, SC telescopes) and your eyes are
> parallel to the horizon. With a newtonian reflector you have to choose
> "Mirror image E/W".

Either I'm reading this paragraph all wrong, or Bernd is mixing something. Or
perhaps it is a confusion of wording. Nevertheless, a newtonian will rotate
your field of view by 180 degrees. That is South is up, East is to the right. In
a SCT w/diagonal or a refractor w/diagonal (odd number of reflections), North is
always "up", but East is to the right. Ie. the image is mirror reversed. That's
why using a printed chart like Uranometria is simpler with a newt than with a
SCT w/diagonal, because you may just turn the atlas upside down.

So, just follow Bernd's explanation above, but exchange the types of telescopes,
and you should be all set :)

Best regards,

Arild :)

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