Svbony SV181 Focuser Telescoop, Reflector Telescoop Focuser, All Metal Gear Verstelbare Focuser voor Oculair Reflector Telescoop

je l'ai cannibalisé : les molettes métalliques et leurs visses de la crémaillère ont remplacés -et donc sauvés- l'ancien focuseur d'une lunette en remplacement des molettes plastiques d'origine cassées ! pour les pièces , mais en tant que tel : un super focuseur pour tout télescope newton !! à recommander !

The focuser arrived quickly, I knew I was going to have to modify the reflector tube to fit this but there was more work than I expected (more later), the focuser worm gear was loose and sloppy (more later) but aside from that the unit is nicely constructed and looks nice.So - this was going on a 4" reflector to replace the focuser a former owner had bodged.. Removed the old focuser, offered up this one and the hole in the tube was smaller and the new focuser wouldn't fit...I removed both mirrors from the tube, dremmelled the hole 4mm diameter larger, drilled the new mount holes, made up some spacers so the radius matched, fitted the focuser and refitted the mirrors.columated the scope and took it outside to test out.The eyepiece fitted easily (and snugly), there was no play in the eyepiece / focuser tube / focuser mount etc but the focusing mechanism had a considerable amount of play - so every time you changed focusing direction there was maybe 1/12 of a rotation before it did anything.But once focussed it was ok.So back in the house, pulled the focuser mechanism apart. the worm gears are held together by two small brass plates - which somehow had been bent which allowed the adjustor gears to float rather than meshing correctly. I straightened them, put them back in, re-assembled the unit and most of the play had been removed. There is still some play but it's a lot easier to use now.

Tengo un telescopio y se avía roto y con éste ha quedado como nuevo

Perfect replacement

Rifrattore per telescopio di ottima qualità