Quote:
Originally Posted by alistairsam
Hi,
Is there a sweet spot or optimum range for image scales in a guiding system that provide the best autoguiding?
eg. many use the finder guider where at a 200mm FL and a camera like the qhy5, the image scale is 5.4 odd arcsec/pixel.
would it be beneficial to use a longer FL guidescope with the same camera and if so are there any guidelines or numbers that help determine the optimum guidescope FL?
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There's some discussion of this and a calculator in the article I referenced:
http://www.wilmslowastro.com/tips/autoguiding.htm
Cheers,
Rick.