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What are people using to mag up refractors?
Currently have a WO FLT110 f/6.5 for imaging with a Canon 40d (mod for no IR filter) and have used it with WO field flattener with success. What have people used with good results to mag-up to 2x or even 3x of the current field size? (currently get about 1.6 degrees).
My autoguider is an Orion StarShoot hooked up to PHD autoguider software and yes I know it is tricky to mag up as that just magnifies the guide/seeing issues but I want to try it a bit.
Will a 2" 3-element Orion type barlow be acceptable for central area or will a Televue powermate barlow be noticeably better.
Also please comment on if the field flatness goes to heck in this case OR if the field flattener I have now might as well be removed when using the barlow.
Thanks for any thoughts,
Mark
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