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what does a 2.5 barlow add to the imaging backfocus


iwols

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1 hour ago, iwols said:

well,just going to add the televue 2.5 to my imaging train on a c8 edge but what back focus does it add please

I've no idea what the actual back focus would be but I've just started using a 2.5x powermate with a Zwo Asi 224mc camera and a C11. No issues with focus or floppiness with the imaging train.  

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