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Canon 400mm F2.8 L FD (non-IS, manual)
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10-09-2015, 02:32 PM
blink138
(Pat)
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Join Date: Aug 2009
Location: perth w.a.
Posts: 2,275
any sort of reworking is going to cost you a multicoat bojan, you know that right?
depending upon the refractive index of the glass you are going to lose 6% off each surface, not a trivial amount!
pat
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