Hi,
I’m after some ideas how to deal with my eyepiece collection having annoyingly different focal points.
The telescope is a Skywatcher 10 inch collapsible dobsonian (1200 mm focal length, f4.7).
My eyepieces are ES 8.8mm 82 deg, a 13 mm T6 Nagler and the standard 10 mm and 25 mm Plossls the telescope came with. There’s an ES 24 mm 68 deg on its way as well. They are all 1.25 inch eyepieces.
So, the skywatcher eyepieces and the ES 8.8 mm are within focus when I have the standard 1.25 inch tube attached (the 8.8 mm is just in focus). For the 13 mm Nagler, I need the 2 inch extension tube plus the 1.25 inch tube or I need to pull out the Nagler by a bit over 1 cm when only the 1.25 inch tube is attached, which is obviously not how I’d like to handle any eyepiece.
Have any of you come across a similar issue and if so, what might be the solution? Different length extension tube? New focusser? Replace the ES eyepieces with Naglers/Panoptics (no Ethos)
? I would appreciate any thoughts and experiences.
Thanks
Daniel