images taken post Tombaugh extension
Tombaugh Extension update
I’m nearly finished with the Tombaugh extension. The total weight is about 80lbs including the focuser and the secondary assembly (does not include any eyepieces or cameras.) The height is 32 inches and the width 36″. The secondary will set about 12″ inside the last octagonal ring so there is no need to use a light block extended past the tube. The only difference will be the focuser and the secondary mirror will be 1 1/2 to 2″ closer to the primary than that shown in the picture.
I’m getting the cage assembly sand blasted this week and taking it to be powder-coated (flat black). If all goes well we could use the Tombaugh visually by the new moon in late November…
