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Re: [APML] Southen sky wide-fields

On Sat, 29 May 2004, Stuart Heggie wrote:

> You are the only person I know of using a SP-DX mount - is it as good as
> I'm told? Great story about the water tank too!

Stuart,

thank for your nice comments! The SP-DX is a good mount, although its
maximum load is of course limited. Piggyback shots up to 135 mm need
hardly any guiding corrections (if the mount is accurately polar aligned).
The polar viewfinder is very precise.

Backlash in Declination is quite substantial, and using an ST-4 autoguider
requires a few tricks (such as switching the Dec. speed to 32x for a few
seconds during calibration).

Clear skies,

Axel


-- 
Axel Mellinger  <http://canopus.physik.uni-potsdam.de/~axm/astrophot.html>
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