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1) the Lodestar with its better sensitivity will probably give more stars to guide on.
2) If the DSI can find you lots of guide stars, then I dont believe a lodestar from its sensitivity side of things is going to improve you a great deal.
People use alot of simple setups to autoguide very successfully. Again it comes back to what are you trying to improve with your autoguiding?
I use a SSAG on an 80mm f5 refractor, don't have trouble finding guidestars, even 1 pixel dots of light are fine. Seeing seems to play a more signifcant part in autoguiding, with the answer there being longer subs for guiding to average out the effects of seeing.
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