I have a question regarding 2" vs 1.25" fittings.
My newly bought XT10i Orion telescope comes with a 2" Crayford focuser and two 1.25" Plossl eyepieces, and a removable 1.25" adapter for those eyepieces. In the future I will be buying good quality eyepieces, both 2" and 1.25".
I want to buy a ES UHC Nebula filter and a ES 2x Barlow. They both come in 2" and 1.25" formats.
I do not understand anything about how to fit accessories yet, so please apologize for my question!
- Can I fit the 2" UHC filter into the 2" focuser, and then use, depending on my choice, either a 2" ES low power eyepiece, or with a 1.25" eyepiece (if I use the adapter)? Or is this not doable? (I will probably use the filter more with 2" eyepieces in the future, but for the moment I only have a 1.25" 25mm Plossl) I would assume choosing a 2" filter over a 1.25" would allow me this choice, whilst a 1.25" filter would restrict me only to 1.25" eyepieces, which is not a good idea for nebulas.
- How about for the Barlow? I will be using probably only with 1.25" ES eyepieces. Shall I buy a 1.25" Barlow or can I buy a 2" and do the same playing around?
Sorry for my question but I am mostly a beginner with the XT10i, having only had a 60mm refractor on the past.
With many thanks!