Negative profile 2"-1.25" adaptor

[Andrew*]

I had this idea today, and don't know why I never thought of it before. For all those focus problems people have with newtonians etc. - why not a 2"-1.25" adaptor so that the eyepiece can sit further inside the focus tube?

I can see some restrictions - eyepieces that are too short will not project out of the adaptor, and eyepieces with a girth larger than say 48mm will not fit in, but otherwise, wouldn't it be useful?

Does it actually already exist??

[Merlin66]

Interesting concept!!

It would certainly work to give some extra "in-travel" for a 1.25" eyepiece in a 2" focuser.

Never seen one exactly the same but the nosepiece end of my TeleVue 2" eyepiece projection adaptor basically holds the eyepiece in a similar position... maybe could be used..... Hmmm

Ken

[Doc]

It would work but only for 1.25" eyepieces, very interesting design and very simple, strange how no one else has though of this.