SVBONY SV222 high-quality 90-degree erecting prism with anti-reflection coating allows for good contrast and bright images. Designed with entirely aluminum, black anodized eyepiece holder, large, chromed thumbscrews, SV222 is internally blackened and baffled to prevent internal stray light reflections. For terrestrial or astronomical use, this diagonal produces a right-side-up, non-reversed image with correct daytime orientation.
SV222 Erect Prism Diagonal 90 Degree 1.25-inch Anti Reflection Coating Metal for Refractor Telescope
-- Necessary for Astronomical Observaton
Effectively reduce reflection and scattering on the surface of the lens, improve image clarity and detail expression.
Matting & Thread Design
Absorb excess light, prevent light reflection interference, and provide clearer and more accurate observation images.
Thread design ensures the stability and reliability of the observation device, reducing shaking and shaking during observation
Matting Velvet On Side Panels
Brass Pressure Ring
SV222 diagonal 90 degree protects the eyepiece from being worn by the screw; the eyepiece can be changed quickly without affecting the stability of the entire optical system.
Eyepiece Anti-contact Stopper Design & Cone Anti-drop Insert
Support Standard 1.25 Inch Filter Installation
SV222 erect prism diagonal 90 degree is designed with 1.25 inches thread, which can connect filter and meet various needs of customers.
Strong and durable
SV222 erect prism diagonal 90 degree with all metal construction, durable steady for a long-term use.
Comparison Before & After Use
For terrestrial or astronomical use, the mirror produces a face-up, non-inverted image with correct daytime orientation.
|Optical Design||Prism Diagonal|
|Inner Connection (Lens Sided)||Thread M28.5x0.6|
|Outer Connection (Lens Sided)||Barrel 1.25inch|
|Inner Connection (Eyepiece Sided)||Clamp 1.25inch|
|Image Orientation||Erect image, non-reversed|
|Optical Length||appr. 65.6mm|
|Clamping System||Screw clamps|
|Body Material||CNC Metal Aluminum|
1.High-quality 90-degree erecting prism with anti-reflection coating allows for good contrast and bright images.
2.Entirely aluminum, black anodized eyepiece holder, large, chromed thumbscrews.
3.Internally blackened and baffled to prevent internal stray light reflections.
4.1.25" eyepiece holder comes with anti-marring brass compression ring.
5.Accepts 1.25" eyepieces, fits in 1.25" focusers.
6.For terrestrial or astronomical use, this diagonal produces a right-side-up, non-reversed image with correct daytime orientation
7.Not recommended for use in Newtonian reflector or DOB reflector telescopes
8.Tips：But all Prism Diagonal-no matter how good they are – suffer from one design feature: There is a line going through the center of the image, where both sides of the prism surfaces come together. This may cause reflections or spikes. To some extent, this will always happen when a bright object like a star is viewed in front of a dark background like the night sky. This should be obvious only with very bright stars or planets.
SV222 1.25" 90 Degree Metal Correct Image Prism Diagonal
1PCS M4 Screws
1PCS Dust Cap
1PCS Dust Plug