• USB interface; plug into a USB power adapter; a portable charger; the USB cable makes lens warmer ideal for indoor and outdoor use;
• Temperature range; working temperature adjustment range from 25 degrees to 70 degrees to suit different weather environments;
• Fastener design; with handy fasteners; it can wrap around your lens or scope with security and is easy to adjust;
• 430mm effective heater length; liminate dew; fog; and condensation with our specially crafted lens warmer during cold weather photography;
• Designed with PWM Function, which can provide more accurate, energy-saving, efficient heating control, thus enhancing the performance and reliability of telescope equipments.

Note: This dew heater is suitable for SV503 70ED, SV48P, MK105, SV503 80ED, SV503 102 ED, SV550 80 APO

• 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.

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• 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

• 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

• 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.

• 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.

• SV213 3x Barlow lens triples the magnification of all 1.25 inches astronomical eyepieces, and very suitable for various short focal length telescopes;
• All optical glass surfaces have multi-layer coating. The 3-element air space design can eliminate color difference, so that you can enjoy a clearer, sharper and more real vision;
• The housing is precision machined from aluminum stock and black anodized to a hard finish;
• The Barlow lens has a compression ring that doesn't leave any marks on cameras or eyepieces;
• The SV213 Barlow lens optical components are detachable, which is convenient for daily cleaning to keep the lens clean.

• The SV216 Barlow lens adopts a 4-piece telecentric design, which effectively prolongs the focal length of the primary mirror without introducing chromatic aberration and vignetting problems that bother users. Offers excellent spherical aberration control, resulting in a flatter field of view than standard Barlow lens;
• The magnification of the SV216 Barlow lens is constant at 2 times. the 4-piece design of the Barlow lens and the optimized optical structure ensure that the magnification factor of the Barlow lens remains unchanged no matter where the Barlow lens is installed in the optical system;
• SV216 2x Barlow lens adopts 3 screws design and coaxial locking device. Improving the concentricity of the optical axis of the system can significantly improve the quality of captured images;
• The 4 lenses of the SV216 Barlow lens are fully multi-layer enhanced coating, which makes the picture bright and sharp. The edges of the lens are blackened to eliminate internal light scatter to maximize image contrast;
• The low magnification eyepiece is matched with the SV216 telecentric 2x 4-element Barlow lens, which can enjoy the magnification effect of the high magnification eyepiece while the eye relief distance is still within the comfortable observation range of the human eye.

• SV209 is a special field flattener for SV550 80F6 OTA, which can effectively improve the image quality problem of SV550 OTA fringe field curvature; At the same time, the focal length and focal plane position of the primary mirror remain unchanged;
• The package of SV209 is equipped with an M63 extension tube and an M48 adapter ring to ensure that the back focal length of the flat field mirror is the astronomical conventional 55mm length;
• The effective field of view of the 45mm large target surface supports not only half-frame cameras; but also full-frame cameras;
• Built-in 2-inch filter mounting thread; supports 2-inch filter installation; customers do not need to buy a filter adapter ring separately;
• Maximum working distance from the M63x1 internal thread: 103 mm - space enough for almost all adaptations.

Note: The SV550 80 APO is designed with f/6 focus ratio. When reducing the focus further, the image quality will not be guaranteed. This is why we produce 1.0x flat field instead of 0.8x.

• SVBONY cellphone holder connects a cellphone to an astronomical telescope, the holder fit all 0.965" telescope, eyepiece, most 1.25'' eyepiece, 23.2mm microscope eyepiece and small binocular/monocular eyepiece: For eyepiece diameter within 0.94-1.5inch / 24-38mm;
• Fit to many cell phone models: For cell phone width within 2.36-3.74inch / 60-95mm;
• Compatible with many optical devices: you can use it to connect your phone to a telescope, a microscope, a spotting scope, a binocular or a monocular;
• Adjustable holders: 360°rotating phone holder;
• The Phone is fixed foam friction to prevent your phone from being scratched or damaged.

• SV190 eyepiece paired with the SV503 telescope and the SV188P diagonal is ideal for deep sky visual;
• Ultra flat field eyepiece; SV190 eyepiece can achieve the purpose of correcting the defects of field curvature and improving the imaging quality at the edge of the field of view;
• Achieve clear imaging; eyepiece optics are fully multi-coated; full multi-coated lenses for sharp imaging;
• SV190 telescope eyepiece provides a 60-degree apparent field of view and 16mm of eye-relief; the eyes will not feel uncomfortable when watching for a long time;
• Blackened lens edges; SV190 ultra flat field eyepiece feature blackened lens edges for maximized light transmission and excellent contrast;
• Fold down eyecup; soft rubber eyecup can be folded down from the edge; it's friendly for people who wear eyeglasses;
• Compatible with SV406P; adapt to the SV406P plug-in bird watching scopes; providing you with more possibilities for bird watching.

The SVBONY Helical Focuser allows for precise focusing of eyepieces or cameras. It is ideal in connection with a guide scope and a guide-camera. such as SV165 series mini guide scope. The focuser features a female T2-thread on the telescope side, while allowing the attachments of 1.25" equipment on the eyepiece / camera side. In addition, there is a male T2 thread on the camera side. During focusing, the attached accessories keep their orientation and don't rotate. The exact focus position can be fixed with a clamp screw.

• Eliminate focus problems:The inner thread of the extension tube is M48*0.75 and the outer thread is M48*0.75, which elegantly solves the spacing problem in astrophotography and eliminates a series of focusing problems;
• Variable Combination:The desired spacing can be achieved by combining several extenders of different lengths Use this extension tube to obtain the correct image scale or the exact spacing required by the reducer or field flattener;
• Aluminum alloy material:High-quality all-metal structure and anodized aluminum process, durable;
• Eliminate Excessive Light:The internal thread design can eliminate stray light and reflected light, making the image clearer and more perfect;
• 100% Satisfaction:We provide 1 year warranty. If you have any questions about our products, please feel free to contact us.

• 2" T to M42*0.75 Adapter Thread for Astronomy Monocular Telescope Mount Adapters Accept 2" Filter and Camera;
• The SVBONY City Light Suppression broadband filter is designed to improve the visibility of various Deepsky objects. It selectively reduces the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings(including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere);
• Light Pollution Reduction UHC Filters are designed to selectively reduce the transmission of certain wavelengths of light specifically those produced by artificial light;
• Moon filter can reduce glare and increase contrast of the moon, so you could see more moon details, also useful for extra bright planets as well as terrestrial viewing over sand or snow;
• The UV IR cut filter uses the very latest coating technology to deliver the finest filtration quality, and lifetime durability. If you use DSLR camera, CCD camera, or telescope, it absolutely will be one of your best choices.

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• This SV211 handle 135mm is suitable for OTA SV503 70F6, SV503 80F7 and SV550 80F6. Adjust the position of the handle, improve the safety factor of the product installation process;
• SV211 handle fits SV198 or other guide mirrors and viewfinders, provides a guide scope and finder scope mounting platform for easy installation of accessories;
• Fully CNC integrated finishing anodized aluminum, strong and durable, the handle will not be easily damaged for long service life;
• SV211 handle is easy to carry when traveling and going out, no pressure to hold. Suitable for carrying and protecting telescopes at short distances;
• 2 M6 mounting screws, 4 M4 set screws, unified interface type, strong matching type, easy to install and remove.

SA402 universal hydraulic pressure aluminum alloy travel tripod with 1/4 inch quick boot plate for spotting scope and DSLR, maximum load capacity 13.2 lb/6 kg.

• SV193 0.8x focal reducer can take dazzling celestial photos without worrying about the distortion of the star points on the edge of the photo;
• The front is a standard 2-inch socket for connecting the main lens. The rear is a M48x0.75 thread for connecting the camera mount. Supports full-frame cameras;
• The SV193 can be connected to a standard 2" filter thread to add the light pollution filter you need；
• The 0.8X defocus system shortens the exposure time. It can meet the needs of astronomical photographers who need sufficient exposure in a short time.

SV193 Connect with 1.25inch SV705C Camera

• 210mm dovetail plate and adapter(clamp) set easily to do balance work;
• Dovetail clamp: two M8, five M6, and one 1/4'' hole;
• Dovetail plate: standard 1/4'' hole, The space at both ends can be passed by M6 screws to connect your telescope.

Note: These screws aren't included

This vehicle window mount has vertical and horizontal angles to adjust, and it can rotate 360-degree, which eliminates the trouble of setting up a tripod while viewing.

Convenient hybrid adapter lets you use older style M42 format eyepieces in modern telescopes that typically only accept 1.25" format eyepieces.

• Camera angle adjuster; The CAA image field angle adjuster can easily adjust the shooting angle without rotating the main mirror, saving customers the tedious installation and disassembly process;
• CAA 360-degree rotator; Improve the stability and portability of the shooting process, it is mainly used for astrophotography scenes;
• Camera angle adjuster for SV550 refracting APO telescope, also compatible with astronomical telescope lens barrel with M63x1 threaded astronomical focusing mounts;
• locking screw M4; With locking and positioning function, the camera can be positioned at any position;
• CAA with field flattener can correct the defects of the field curvature of the shooting target, and improve the imaging quality and shooting efficiency at the edge of the field of view;

Svbony SV181 fully metal 1.25'' R&P Newtonian reflector focuser with 65mm focuser travel. Very popular DIY accessory.