Darryls Posted February 6, 2015 Share Posted February 6, 2015 I have some Baader Hyperion eyepieces that I use with my DSLR and an Intes 6" Mak-cass. (The camera is coupled to the eyepiece with a T-thread adapter). In order to get it to focus, I have to add about 5" of extenders between the eyepiece and the focuser! If I add a T-extension between the camera and the eyepiece, will that reduce significantly the total "inches of extension" required? Link to comment Share on other sites More sharing options...
Macavity Posted February 7, 2015 Share Posted February 7, 2015 (edited) Wot, no replies? Risking wind and limb, I will try...I sense you are trying out Eyepiece Projection?(For which Baader Hyperions are advertised) I'm just revisited this with a view to documenting thevarious configurations etc. (A major change for me)!My (experimental) findings (conformable via theory):Eyepiece projection... requires the eyepiece to beracked out significantly towards the observer andbeyond the normal position for visual observation. (May not be terribly convenient for Newts etc.)Adding extra T2 extenders behind the eye lens willcertainly increase the "magnification" - Will effectthe in / out focus. But it won't significantly reduce the typical extension required to achieve focus. The technique may still be useful, I sense... Catadiopteric systems (SCT's, Maksutovs etc.)have much greater range of in / out focus etc. Edited February 7, 2015 by Macavity 1 Link to comment Share on other sites More sharing options...
Owmuchonomy Posted February 17, 2015 Share Posted February 17, 2015 Aaah yes. I use an 8mm BH for planetary EPP with my D60. It works ok on my 9.25 SCT due to the huge focus range on tap. With my frac it is easy to see the amount of focusser movement required. I have to draw the focusser out to 90mm of back focus to get it to work. Link to comment Share on other sites More sharing options...
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