I got one of the last bintel 10"s without the 10:1 and now im going to upgrade.
The focuser assembly seems to be exactly the same with the exception of a bolt on bit that has a geared knob that changes the ratio i.e 10 turns of the black bit will give you one turn of the main bit. Look on the bintel site under ATM supplies for some more info about the focuser's.
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