Asking if anyone has replaced the 2 inch focuser on the Explore Scientific Ultralight 10 inch Dobsonian OTA. The original focuser was dinged during a public star party. I'm considering a helical focuser, Moonlight focuser and JMI focuser. Sharing your thoughts and experiences is appreciated.
Replacement focuser for ES 10 inch ultralight Dobsonian telescope
Posted 17 May 2021 - 05:59 PM
I have a Moonlight on my 12" Dob and love it. Years ago I built a 10" f/5.5 with a helical focuser. I later upgraded to a Crayford - Got tired of the screwing / unscrewing when changing eyepieces. I found even with the single speed JMI Crayford (back in the '90s) I could focus with completely sufficient accuracy, sans the aggravation of the helical focuser. I later had a Meade 8" SN that came with a nice CNC helical. Despite having a spring-loaded ball bearing "thread", I replaced it as well.
YMMV, but FWIW.
Posted 17 May 2021 - 07:04 PM
If you get a Star Light Instruments focuser, you will never need to worry about whether you have the best focuser ever again.
Posted 17 May 2021 - 07:35 PM
I have three Starlight/Feathertouch focusers. I never worry about having the best focuser whether it's a GSO or Feathertouch, they both do the job.
Personally I would look into repairing the current focuser or finding a drop in replacement. Helical focusers are as Len says.. You do not want to go there.
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