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Hi Jowel,
No, you don't see any obstruction in the view as the primary mirror collects the light in a big tube shape coming down to it (minus the section blacked out from the secondary mirror) and then the parabolic shape of the primary mirror focuses the light all onto the secondary mirror which reflects it out to the focuser. As this is focused onto the flat 45% you dont see the secondary shadow.
Google a dobsonian design and you should see a light path diagram which outlines what I mean.
Cheers
Chris
ps. the only silly question is the one not asked.
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