helicoid focuser for 8" Newton with 2" filter slider

thingiverse

The helecoid focuser fits on all 8" Newtons with 203 mm steeltubes (without changing the lenght of the tube!) You need: 1x Pixco M65-M65 helicoid 1x 2" eyepice Tube (50mm long) (please adjust the hole in the eyepice tube adapter yourself. Make half a mm wider as necessary!) 1x 9,5mm ball catcher and some 52mm to 48mm step down rings for the filter slider 4x 3mmx25mm screws 4x 3mmx20mm screws a bit two-component adhesive to fix the single parts Print all parts with 2mm thick walls to make it stiff enough!! Pic 1: 65mm-65mm helicoid Pic 2: 2" eyepice tube, 9,5mm ball catcher, 52mm-48mm step down ring Pic 3: I designed the base in 3 parts, so there's no support needed. Pic 4: The eyepice tube is glued into the PETG Adapter // The PETG Adapter is glued into the Helecoid (just three little drops of glue between the screws of the helicoid) Pic 5: make the original focuser screws fit the base and fix it on the tube Pic 6: fix the filtercase with 4x 3mmx25mm schrews onto the base // fit in the ball catcher Pic 7: squeese the helicoid carefully into the top plate. (be aware, that the helicoid is screwed completely together) Pic 8: turn it around and give some glue to edges Pic 9: glue the step down ring into the slider Pic 10: The design allows you even thick filters (here my castel UHC, wich is 9mm high) Pic 11: although the china helicoids have a certain thread play, I gave it a go on my 8"f5 foto newton. focusing is really fun and my eos600da was held really secure. Pic 12: M81/M82: 19x 6Min; ISO 800; IDAS LPS2; EQ6; guiding PHD2