This diagonal can only be used with refractor telescopes and some catadioptric telescopes like Schmidt-Cassegrain, Maksutov-Cassegrain, etc. It not meant for use with Newtonian / DOB reflector telescopes or other variants of Newtonian telescopes.
SVBONY SV221 1.25-Inch 45 Degree Correct Image Prism Diagonal Provides Sharp Views That Are Right-Side-Up and Correct Left-To-Right for Refractor Telescope
SV221 1.25" 45 Degree Correct Image Prism Diagonal -- For Moon & Planets Viewing
Enhanced aluminum die/coated prism
The brass pressure ring design
Bulit-in prism steering system
Internal extinction treatment
Support connection 1.25inch filter
Large thumb screws
The main mirror housing is made of precision molded ABS plastic. The two end barrels are precision machined from aluminum, enhanced aluminum die/coated prism with higher light transmittance & clearer vision.
Built-in prism steering system & support connection 1.25inch filter, internal extinction treatment.
Brass lock Screw for eyepiece or adapter and brass Compression rings features more precision and prevent barrels or the surface of eyepieces from marring and scratching.
SV221 1.25" 45 Degree Correct image Prism Diagonal
3PCS M3 Screws
1PCS Dust Cap
1PCS Dust Plug
|Optical Design||Prism Diagonal|
|Inner Connection (Lens Sided)||Thread M28.5x0.6|
|Outer Connection (Lens Sided)||Barrel 1.25 inch|
|Inner Connection (Eyepiece Sided)||Clamp 1.25 inch|
|Image Orientation||Erect image, non-reversed|
|Optical Length||appr. 86mm|
|Clamping System||Screw Clamps|
|Material||Plastic & Metal|