ATM Focuser travel on Dob

["Russell Jocoy" <russjocoy@hotmail.com>]

("atm@shore.net")

             Hello all,
                 I have a question that maybe someone could help me with.  I 
am about to mount my
focuser on my secondary cage. When the scope is in focus should the barrel 
travel of the focuser
be at mid-rack?, or closer to in or out. I suppose I could test and find out 
but I am cutting my truss
poles for this adjustment. Will a barlow lens change the position of where I 
should make my focus
stop.??                           Russ Jocoy
("atm@shore.net")

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