So in case any one is interested for posterity's sake, i have talked with the guys from Bintel and they have informed me that putting a barlow or a powemate in a F4 scope does not make it act as a F8 scope. the coma is an artifact of the mirror and magnification will only zoom in on the issue, not correct it. therefore if you want to have a flat FOV you need to attach the barlow/powermate to a coma corrector. this is what i will be doing, hoping for some good results.
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