• Enhanced Aluminum Die; the SV221 diagonal mirror is designed with enhanced aluminum mold; which has higher light transmittance and clearer vision;
• 1.25 inches diameter; the diagonal has a diameter of 1.25 inches; which can be applied to a 1.25 inches telescope and a 1.25 inches eyepiece;
• With a brass pressure ring; the telescope diagonal has a brass pressure ring; which can prevent surface damage and scratch marks when the eyepiece is used with the diagonal;
• Supports 1.25-inch filters features internal extinction treatment and supports the connection of 1.25-inch filters; Offering versatility for various observations;
• With filter thread; the diagonal has M28.5x0.6mm filter thread; which supports the connection of 1.25 inches filter;
• 90 degrees deflection angle design; you don't have to bend over when performing visual observation; and the observation experience is more comfortable;
• Internal extinction design; the correct image prism diagonal has internal extinction treatment; and the acquired image is clearer and brighter.

• Enhanced Aluminum Die; the main mirror housing is made of precision molded ABS plastic and the two end barrels are precision machined from aluminum;
• 1.25 inches diameter; the SV221 diagonal mirror can be applied to a 1.25 inches telescope and a 1.25 inches eyepiece;
• With a brass pressure ring; the diagonal mirror has a brass pressure ring; which can prevent surface damage and scratch marks when the eyepiece is used with the diagonal;
• Supports 1.25-inch filters features internal extinction treatment and supports the connection of 1.25-inch filters; Offering versatility for various observations;
• With filter thread; the diagonal mirror has M28.5x0.6mm filter thread; which supports the connection of 1.25 inches filter;
• 90 degrees design; the diagonal mirror 90 degrees deflection angle design; you don't have to bend over when performing visual observation; and the observation experience is more comfortable;
• Internal extinction design; the SV221 has internal extinction treatment; and the acquired image is clearer and brighter.

Note: 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.

• Firm locking; SV223 diagonal mirror has a clicklock locking mechanism; just turn the clicklock to securely fix the accessory; ensuring the eyepiece is installed and used stably; not easy to fall off
• Coating: 99% Reflectivity SV223 diagonal mirror has metal high reflective dielectric coating
• Surface accuracy: 1/10λ
• High-quality machining out of the aluminum; SV223 star diagonal is composed of High-quality aluminum elements; chic; light and stable; internal antireflection baffling for highest contrast
• 90 degrees design; SV223 star diagonal has a 90 degrees refraction angle; providing a better observation experience when visually observing.

SV223 vs Baader: Watch Now!

Top Gift Ideas: Perfect Presents for Astronomers!

• 1.25-inch aperture; SV222 45 degree diagonal is 1.25-inch aperture; strong versatility; can be applied to 1.25-inch eyepieces and astronomical accessories
• The image is clear and bright; correct image diagonal adopts a 45-degree upright prism; with full multi-layer coating and phase coating; the image contrast is high; the picture is clear and bright
• Delustering design; blackened and baffled inside; it can prevent internal stray light reflection
• Metal material; 1.25 inch SV222 telescope diagonal is made of aluminum alloy metal material; with black anodizing; sturdy and durable
• The installation is stable; brass pressure ring design; SV222 45 degree diagonal is firmly connected with the eyepiece and does not shake; it will not scratch the eyepiece

• 1.25" diameter; SV223 diagonal adapter can be combined with 1.25" eyepieces and barlow lens; suitable for any 1.25" telescope accessories;
• Stable installation; the SV223 dielectric mirror has a clicklock locking mechanism; which can realize ultra-fast clamping action and ensure the stable installation and use of the eyepiece; SV223 star diagonal not easy to fall off
• Image is clear and bright; High precision 11.5mm thick mirror substrate flat for optimal image stability. the SV223 dielectric mirror is equipped with a thick precision optical flat mirror with an enhanced 99% reflective dielectric coating; which has a large amount of light transmission and a good imaging effect
• High-quality aluminum material; internal antireflection baffling for highest contrast; which is light and stable; ensuring that the star diagonal is durable and can reduce the weight of the equipment without affecting the balance of the equipment
• Enhanced Protection Features: Internal safety stop prevents barrels from hitting the mirror. Stainless Steel compression rings (both on diagonal and adapter) to prevent barrels from marring.

Top Christmas Gift Ideas: Perfect Presents for Everyone!

• 90-degree design; SV222 90 degree diagonal mirror provides a better observation experience when visually observing
• Extinction thread; Extinction thread prevents stray light from entering; ensures observation quality
• 1.25 inches thread; 1.25 inches SV222 telescope diagonal can connect filter; meet various needs of customers
• Locking mechanism; SV222 90 degree diagonal mirror ensure the stable installation and use of the eyepiece; not easy to fall off
• 99% high reflectivity; telescope accessory have large amount of light transmission; good imaging effect

• Dielectric coatings; super flat mirror with dielectric coatings to reduce reflected light loss; provide an over 99% reflective surface; good for astronomical viewing;
• The 1.25-inch nosepiece fits 1.25-inch telescopes and accepts standard 1.25-inch filters, eyepieces, Barlow lenses, and similar accessories; The 2-inch nosepiece is compatible with 2-inch telescopes and accommodates standard 2-inch filters and accessories. You can choose either 1.25inch or 2inch diagonal based on your requirements;
• 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.

Top Christmas Gift Ideas: Perfect Presents for Everyone!

Set Includes:

• SV215 Clickstop Zoom Eyepiece 1.25 inch 3-8mm, SKU: W9166A
• SV182 6x30 Right-Angle Finder Scope, SKU: W9141B
• SV188P 90 Degree Dielectric Mirror Diagonal, SKU: F9171B(1.25inch) / F9171D(2inch)

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.

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.

• The illuminated crosshairs eyepiece is precisely located in the center of the eyepiece field of view; providing accurate results that allow you to easily track the guide;
• Wide 70-degree apparent field of view makes acquiring and centering target objects a breeze; comfortable 16mm eye relief So you do not have to worry about the goal disappearing quickly;
• Brightness adjustable function; which has relatively low energy consumption at lower brightness; which can extend the life of the illuminator; with a crosshair for illumination;
• The standard 1.25-inch filter thread is compatible with all 1.25-inch standard equipment; the threaded extinction inside the eyepiece can well suppress the reflection of internal stray light; giving you a bright high-contrast view;
• Perfectly guided astrophotos; The crosshairs for easier use and alignment; excellent for accurate polar and go-to alignment;
• Fully multi coated broadband green optics with superior optical performance; clarity is great.

Bundle 1: SV550 122APO telescope OTA + SV230 Zoom Eyepiece + SV223 Diagonal + SV211 Handle Bar + SV212 Carrying Case Bag

Bundle 2: SV550 122APO telescope OTA + SV215 Zoom Eyepiece + SV223 Diagonal + SV211 Handle Bar + SV182 Finder Scope + SV212 Carrying Case Bag

Bundle 3: SV550 122APO telescope OTA + SV209 Focal Reducer/Field Flattener + SV223 Diagonal + SV211 Handle Bar + SV165 Guide Scope + SV192 Dew Heater                                

Review Video by @NebulaPhotos    Unboxing Video

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This SV503 102ed doublet refractor Telescope Set is suitable for astronomical visual observation.

Visual Set-1 includes: SV503 102ed OTA, SV211 handle bar, SV182 right-angle star finder, SV188P 1.25" diagonal, 2x barlows, 6-20mm 1.25" 68-degree UWA eyepiece set, and universal dovetail slot.

Visual Set-2 includes: SV503 102ed OTA, SV211 handle bar, SV182 straight star finder, SV188P 1.25" diagonal, 2" extension tube 75mm, 2x barlows, 6-12-25mm 1.25" plossl eyepiece set, and universal dovetail slot.

Visual Set-3 includes: SV503 102ed OTA, SV211 handle bar, SV182 right-angle star finder, SV188P 1.25" diagonal, 6-9-15-20mm 1.25" 68-degree UWA eyepiece set, and universal dovetail slot.

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Use this APO OTA apochromatic refractor to reveal the wonders of celestial bodies!

Bundle1: SV550 80APO OTA + SV223 Diagonal + SV216 Barlow Lens + SV172 Dew Heater + 68 Degree UWA Eyepiece Set

Bundle2: SV550 80APO OTA + SV182 Finder Scope + SV188P Diagonal + SV230 Zoom Eyepiece

Note: This SV550 80 OTA comes with a dedicated dovetail slot for the finderscope.

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These Mk105 telescope bundle are suitable for visual observation of the planets moon and etc. 

Bundle1 includes:

• MK105 OTA
• SV182 finder scope
• SV188P 1.25inch diagonal
• SV135 1.25inch 7-21mm zoom eyepiece
• SV225-SV225T AZ mount & tripod kit

Bundle2 includes:

• MK105 OTA
• SV182 finder scope
• SV188P 1.25inch diagonal
• SV135 1.25inch 7-21mm zoom eyepiece

This Solar Set includes:

• SV550 80APO, SKU: F9381A
• SC432M Mono Sun Camera, SKU: F9387A
• SV223 2inch 90-degree Diagonal, SKU: W9180B
• SV229 solar filter, SKU: W9183B

Set Includes:

• SV503 102ED Refractor OTA Telescope, SKU: F9359D
• SV193 Focal Reducer, SKU: W9152D
• SV188P Diagonal, SKU: F9171B
• 2inch UV/IR Cut Filter, SKU: F9127B
• SV211 203mm Handle Bar, SKU: W9163B

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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.

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• 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 ;
• 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.

Set includes:

• SV503 102ED Telescope, SKU: F9359D
• SV193 focal reducer, SKU: W9152D
• SV211 handle bar(screws and mout screws inside), SKU: W9163B
• SV188P 90 Degree Dielectric Mirror Diagonal, SKU: F9171B

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• SV503 80ED F7 Telescope Refractor OTA, SKU: F9359B
• SV188P Diagonal, SKU: F9171B
• 68-Degree 6/9/15/20mm Eyepiece Set, SKU: F9152A-F9152B-F9152C-F9152D
• Universal Dovetail Slot, SKU: W2370A

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This SV503 80/102ED Telescope Bundle Set includes

• SV503 ED series refractor OTA
• SV188P 1.25inch Diagonal
• SV191 7.2-21.6mm Zoom Eyepiece
• SV182 Finder Scope
• 1.25inch Moon Filter
• SV224 Universal Dovetail Slots

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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.

Visual set includes:

• SV48P 90 OTA or SV48P 102 OTA
• SV182 6x30 Correct-Image finder scope
• SV188P 1.25inch diagonal
• SV135 Zoom Eyepiece 1.25inch 7mm to 21mm
• SV225 AZ-mount & tripod