SVBONY SV181 Rack and Pinion Focuser, 1.25 inch, Newtonian Reflector Focuser for Newtonian Reflector Telescope

SVBONY SV181 Rack and Pinion Focuser, 1.25 inch, Newtonian Reflector Focuser for Newtonian Reflector Telescope

comments:

serack posted on r/telescopes8w

You are getting good info here but I want to provide some nuance. This telescope is a bit older model that has a 1.25" rack and pinion focuser, whereas most current models have a 2" "Crayford" style focuser that comes with a 2" to 1.25" adapter. (That's what's in the image provided earlier) A 6" 1200mm focal length telescope like this one can get by with only a 1.25" focuser because the f/7.9 focal ratio only allows for moderately tight field of views without the outer edges starting to drop off because it's kind of like looking down a straw (called vignetting). If you chose to do a 1 for 1 focuser replacement, you can get a Svbony SV181 for about $40 on amazon You could get this telescope running well for less than $200 which is still a decent deal.