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I came across this thread on doing a search. I am interested in having a very long FL eyepiece (50 or 55mm) for my 10" Meade F8 ACF. I had been told that at these focal lengths you start to see the shadow of the secondary in the middle of the field of view so have been reluctant to invest.
I see that some of you use 55 mm eyepieces in F10 SCT's with no issues and would be most interested in the views of experienced members re the above.
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