High Quality Errect Image Prism 90°
Multicoated Prism made in Germany after Zeiss Jena Speifications with an clear aperature of 31 mm. The prism Body ( made by Baader) comes on eyepiece side with an T2 ( M42 x0.75) outside photothread and on focuser side with an T2 ( M42 x0.75) inside photothread.
On this T2 threads can be attached 1.25" and 2" eyepieceholders and barrels, so you can make your own ready to go combination.
You can use an 1.25" eyepieceholder with 1.25" barrel, optical mechanical path lenght 84 mm = 3.31 inch, price US $ 275
You can use an 1.25" eyepiece holder with 2" barrel, optical/mechanical patzh length 84 mm =3,31 inch, price US $ 295
You can use an 2" eyepieceholder with an 2" barrel, optical/mechanical path length 94 mm = 3,70 inch, price US $ 320
1.25" barrels comes with 1.25" ( M28.5) inside filter threads
2" barrels comes with an 2" ( M48) inside filter threads
1.25" and 2" eyepiece holder coming with inside brassclamprings
Using an 22 mm Tele Vue Nagler with the 2" combination , zero vigneting at the edge is visible. Using an Tele Vue 31 mm Nagler only a hint of lightcut is visible at the edge of the field