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Extension length
Thanks for all the guidance, I will look into a simple Cheshire type collimator I think.
But with the extension tube that I will need, where should I aim for the focus point to be? Is the middle of the focuser's travel be where I'm aiming for say planets (Jupiter, Saturn) with a 6mm eyepiece? Or should it be closer to the fully wound in or out point?
Based on the barlow with the element removed which is my current working solution, which is around 25mm once inserted has the focuser around 2/3 of its travel.
Bintel sell a 35mm or 50mm 2" extension, the 35 would place it around middle while the 50 would have the focuser wound in most of the way.
I'm leaning towards the 35 as this keeps the focuser tube clear of the tube during observing. Is my logic/understanding missing something with this approach?
Cheers,
Sean
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