The Svbony 90 degree Diagonal coating is precision machined to achieve and maintain good optical alignment. A non-marring brass compression ring inside to secure your valuable eyepieces without any scratch

SVBONY SV223 2inch 90-degree diagonal comes with a thick, precision, optical flat mirror with an enhanced 99% reflective dielectric coating. Dielectric 1/10 lambda levels substrate with 109.1mm optical length（118.6mm with 2"-1.25" adapter ）. Clicklock clamp for ultrafast clamping action. High precision 11.5mm thick mirror substrate flat for optimal image stability. Internal safety stop prevents barrels from hitting the mirror. Stainless Steel compression rings (both on diagonal and adapter) to prevent barrels from marring. High-quality machining out of the aluminum, internal antireflection baffling for highest contrast, provides higher contrast and resolution during critical planetary, lunar and binary star observations

SVBONY SV223 1.25 inch 90-degree diagonal comes with a thick, precision, optical flat mirror with an enhanced 99% reflective dielectric coating. Dielectric 1/10 lambda levels substrate with 85.5mm optical length. Clicklock clamp for ultrafast clamping action. High precision 11.5mm thick mirror substrate flat for optimal image stability. Internal safety stop prevents barrels from hitting the mirror. Stainless Steel compression rings (both on diagonal and adapter) to prevent barrels from marring. High-quality machining out of the aluminum, internal antireflection baffling for highest contrast, provides higher contrast and resolution during critical planetary, lunar and binary star observations.

SVBONY SV222 1.25-inch high-quality 45-degree erecting prism with phase coatings allows for good contrast and bright images. Designed with entirely aluminum, black anodized eyepiece holder, large, chromed thumbscrews, and internally blackened & baffled to prevent internal stray light reflections. 1.25" eyepiece holder comes with anti-marring brass compression ring. SV222 accepts 1.25" eyepieces, fits in 1.25" focusers. Suitable for terrestrial or astronomical use, this diagonal produces a right-side-up, non-reversed image with correct daytime orientation.

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.

The main mirror housing is made of precision molded ABS plastic and the two end barrels are precision machined from aluminum. 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.

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 1.25 inch 45 degree arcing prism diagonal allows you to enjoy a great optical experience. Designed for refractor and catadioptric telescopes, not for reflector telescopes.

SVBONY 45 Degree Diagonal has BK7 prism to ensure high-quality optical characteristics. The black line design inside the lens barrel can prevent glare and make the image clearer.

Unlock the full potential of your telescope equipment for moon observing with our versatile and multifunctional accessories! Introducing the Mk105 Maksutov-Cassegrain telescope OTA,  SV231 Fringe Killer Color Correction Filter 1.25/2inch, SV182 6x30 Right-Angle Correct-Image finder scope, SV188P 1.25inch diagonal, Moon Filter 1.25/2inch, SV183 IR Pass 685nm Filter Telescope Filter 1.25 Inch, 1.25/2inch UV IR Cut Filters, SV135 Zoom Eyepiece 1.25inch 7mm to 21mm, SV505C Color Planetary Camera, SC311 WIFI Astronomy Camera, SV225 AZ-mount, 1.25 inch 0.5x Focal Reducer. You can choose whatever you like.

• Dielectric coatings; super flat mirror with dielectric coatings to reduce reflected light loss; provide an over 99% reflective surface; good for astronomical viewing
• 1.25 inches nosepiece fits 1.25 inches telescopes; accepts standard 1.25in filters; eyepieces; Barlow lenses and other accessories with a 1.25in insert barrel
• 90 degree viewing angle; diagonal reflects the telescope’s light path 90 degree to provide a more comfortable viewing angle; best for observing objects overhead
• Correct upside down and left right reversed image; the view image is upright; but left and right reversed if use the 90 degrees to your telescope
• Brass compression ring; Built in brass ring and thumbscrew accessories avoid eyepiece to rotate during adjustments; effortless fixes more firmly and will not scratch your eyepieces barrels

The SV188 mirror diagonal is suitable for refractors, Celestron EQ, Meade Infinity, and similar telescopes. It is not suitable due to the length reflectors for Newton.

• SV215 zoom eyepiece is a good assistant for you to observe and take pictures of the planets;Click and stops design, 6-element of 4-group lens structure; fully multi-coated optics for remarkable sharpness; contrast and color correction.

• Get a sharp image; uses an extremely sensitive CMOS monochrome sensor; the IMX290LLR-C; which has very high QE (80%); very low readout noise (1.0-3.2e); pixel size 2.9um; 1944*1096 pixels resolution; 6.46mm diagonal
• Has a stable transmission; built-in 128MB DDRII image buffer; cache the image and transfer it to the computer when the USB interface is not busy or being interrupted; get a sound frame; allows a slower computer with USB 3.0; to capture every frame without loss; could run another camera using the same computer; without USB transfer problems from the SV305M Pro
• Improve camera sensitivity; has ROI and BIN functions; any resolution can be set; could read a smaller region of interest (ROI) out from the sensor; leaving the image scale of the object being imaged unchanged; greatly increase the camera rate; BIN2*2 pixel can merge two adjacent pixels; which can improve camera sensitivity
• Can automatically guide; designed with ST4 guiding port; supported by PHD2 and the ASCOM platform; use the computer to control the telescope; has an auto-guiding port; which connects directly to the auto-guider; which usually referred as an ST-4 port; works with analog signals
• Good transformation performance; using USB3.0 high speed data transmission; quick and efficient for planetary imaging

This SV503 telescope combination set includes a 102mm ED F7 refractor telescope, a SV223 90 degree diagonal mirror, a SV182 6x30 right-angle correct-image optical finder scope, a SV211 203mm saddle handle bar and a universal dovetail base. It is a suitable telescope visual set for astronomy.

This SV550 122 APO telescope set comes with a SV550 Triplet APO, SV211 203mm handle, SV223 90-degree flagship diagonal, SV215 zoom eyepiece and a SV182 finder scope, along with a customized backpack for telescope. Get this great travel telescope suits for your astronomical visual observation.

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Super wide angle 58 degree apparent field of view.

Super sharp --with five elements fully-coated high-index glass, to give you excellent aberration correction and extremely high resolution rivaling higher-priced eyepieces.

Blackened lens edges, anti-reflection threads for maximum contrast.

Sleek black barrel with safety undercut to reduce the possibility of the eyepiece slipping out of the focuser or diagonal

• 50mm aperture; large diameter objective lens collects more light; the target in the field of view is clearer; convenient to find a target in the sky
• Connect telescope camera; as a guide scope can be used with other accessories to easily achieve automatic star guidance
• Connect Eyepiece; as a right-angle correct-image optical finder scope (Eyepieces and Prism Diagonal sold separately)
• Fully multi-coated glass; multi layer broadband anti reflection coating double glue lens; well made edge coating; higher contrast and clearer field of view
• Fine focusing; double spiral fine focusing and pull out coarse focusing structure; simple structure and convenient operation

The review blog: https://www.svbony.com/blog?s=SV198

This bundle set includes SV208 8x50 finder scope, SV188P diagonal, 0.5x focal reducer, 1.25inch ND filter for moon viewing, multi-function dovetail slots, 1.25 '' T adapter mount with M42 threads and slr camera adapter. It is suitable for moon viewing and photography.

• SVBONY 26mm super-wide angle 2" eyepiece bring you an amazing observation experience; Super-wide 70-Degree apparent field of view gives you that unforgettable lost in space feeling
• Optical eyepiece; 5-Elements; 3groups made of high index glass deliver sharp; high contrast vistas and gives sharp; faithful lunar; planetary; and deep-space images
• High-level craftmanship eyepiece; the SV154 with sleek black barrel with safety undercut to reduce the possibility of the eyepiece slipping out of the focuser or diagonal
• This SV154 eyepiece is threaded to accept standard 2" filters; includes a rubber eye cup for comfortable viewing and is fully multi-coated; Dust caps are included
• Rubber eye cup; SV154 super-wide angle eyepieces come with a removable and foldable soft silicone rubber eye cup for the comfort of the observer; Suitable for anyone wearing glasses and not wearing glasses

• 2" Eyepiece Filter; with metal mount 2" filter threads
• For Horsehead Nebula California; and Cocoon Nebulae in Dark Skies
• Mainly aimed at the 486nm (blue) line spectrum nebula; filters out the interference of other light; can improve the contrast of the nebula
• Through the use of filters; the Horsehead Nebula can be clearly seen; filter with metal mount 2" filter threads; threaded to fit 2" eyepieces and threaded diagonal barrels
• To see a sufficiently dark nebula; ensure a large enough luminous flux; needs to be observed with a large-aperture telescope

• SV132 H-Beta eyepiece filter makes it possible to view the elusive Horsehead, California, and Cocoon Nebulas in dark skies;Great used with a moderate to large aperture telescope and clear dark skies
• Optical high precision double side polishing; Filter substrate is fine-optically polished to 1/4 wave and <30 parallelism over both surfaces; Avoid halos
• Precision double-sided optical coatings improve transmission and cut-off depth; Executes with a transmission of over 90% and completely rejects light pollution
• High value transmission of pass-band and optical density of off-band is assured through planetary rotation system, a homogenous and precise coating procedure; The high optical quality of SV132 filters guarantees no loss in sharpness or contrast
• Filter with metal mount 1.25" filter threads; Threaded to fit 1.25" eyepieces and threaded diagonal barrels

Unlock the full potential of your telescope equipment for moon observing with our versatile and multifunctional accessories! Introducing the Mk105 Maksutov-Cassegrain telescope OTA,  SV231 Fringe Killer Color Correction Filter 1.25/2inch, SV182 6x30 Right-Angle Correct-Image finder scope, SV188P 1.25inch diagonal, Moon Filter 1.25/2inch, SV183 IR Pass 685nm Filter Telescope Filter 1.25 Inch, 1.25/2inch UV IR Cut Filters, SV135 Zoom Eyepiece 1.25inch 7mm to 21mm, SV505C Color Planetary Camera, SC311 WIFI Astronomy Camera, SV225 AZ-mount, 1.25 inch 0.5x Focal Reducer. You can choose whatever you like.

Unlock the full potential of your telescope equipment for moon observing with our versatile and multifunctional accessories! Introducing the SV182 6x30 Right-Angle Correct-Image finder scope, SV188P 1.25inch diagonal,  SV135 Zoom Eyepiece 1.25inch 7mm to 21mm, SC311 Wifi camera, SV225 AZ-mount, 0.5x focal reducer, and 1.25inch filter sets. You can choose whatever you like.