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Re: [ATM] Preannouncement (ECDK)



Richard wrote:
>
> 17.1573% allowing no edge grinding, and if your cutting is perfect :).
> Your corrector lens is at 15.38% so you're well in. Nice idea. I've
> often seen B270 in conjunction with Schmidt corrector plates. Why?
My understanding is that it is purely a question of cost effectiveness.
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