I'd rather have a AG14 (would be 3kg lighter in weight than my existing 10" f4.66 astrograph with the PVC tube) so the Atlux can handle it.
Or if I really lost the plot a AG16 + bigger GEM (though at 23kg the Atlux can handle it + the OAG + guider + 40D).
Neither of these are likely to be viable for me for the foreseeable future unless a big pile of $ falls on me.
There was a EF 200mm f2 L USM for sale secondhand on Ebay a week or two ago.
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