Thread: grinding a primary
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Old 13-04-2005, 12:03 PM
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astro_south (Andrew)
No GOTO..I enjoy the hunt

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Join Date: Jan 2005
Location: Brisbane
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Vingo.....
Not wanting to be picky, but FL won't change with an aperture mask - "Focal Ratio" (FL/aperture) will change though. You are correct about the image being dimmer.
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