Do czego to służy
(1.25") Zero Magnification Camera Focus Adapter for all Dobs and refractors. See below Refractor model 1.25" $149 (0xs-REF) Shown in pictures below. Dobs/Newts $169 (0xs-dob/tube) Dobs/ Newts requires extension tube. Provides 1" of extra out travel focus for all your visual and Photographic applications.
In the picture below you see this little adapter that you thread into the front of your 1.25" Diagonal
Great if your scope has limited in focus. For viewing or photographing applications including H-Alpha. It operates invisibly while flattening your field a little while it lifts out your focus. If you are not completely satisfied with it's performance return it within 60 days for a refund.
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Combo model: Use it in you Newt or just thread it in to your Diagonal.
http://www.siebertoptics.com/Camera%20F ... pters.html