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Erg - must double check mine, when I asked Andrews I recall they said it fits the SD and SD II with an longer extender tube - must double check this!
The SD has a 480mm effective focal lenght versus the SD II has a 500mm EFL. Going to APO means you need to hit a 555 mm EFL. So I presume instead of adding a 50mm tube extender you adopt a 75mm one and all is well?
Fingers crossed - have sent an e-mail to W.O. and Lee Andrews
Last edited by g__day; 12-05-2007 at 02:46 AM.
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