Flat Field Correction: Resolves edge blurring, distortion, field curvature, and chromatic aberration;
ED Glass: Effectively eliminates chromatic aberration ;
FMC Coating: Enhances light transmission and minimizes light loss;
Magnesium Alloy Lens Body: Lightweight, corrosion-resistant, ensuring a longer service life;
Diopter Adjustment: Allows people with nearsightedness or presbyopia to view without wearing glasses.
Anti-skid Focusing Wheel: Fast and easy to operate for precise focusing.

• The SV227 SII filter blocks infrared wavelengths from 700nm to 1000nm so you don't need a separate IR-Cut filter;
• 2 inch mounted; the filter can thread directly into the 2 inch barrel of your telescope eyepiece;
• 300-1000nm wavelength range; the SVBONY SII 5nm 2" Filter transmits a 5nm bandwidth of light that is centered at 672nm;
• This SII narrow band filter reduces other transmissions; including wavelengths of light that are responsible for light pollution;
• The narrow bandwidth and high transmission rate of this filter will make you experience a major boost to contrast.

Note: This OIII filter is NOT for use on the Sun, and is also unsuitable for telescopes with a focal ratio below f/4

• This dual narrow band telescope filter properly designed for astrophotography both in light polluted environment;
• Take color images without needing to combine images with multiple filters. Useful for imaging emission nebulae, planetary nebulae and supernova remnants;
• Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.

• This SVBONY seven-piece accessory kit includes two high-quality 1.25" Plossl eyepieces, a 2xBarlow lens that can be used visually or photographically, three eyepiece filters and a Portable bag;
• With two extra eyepieces and a Barlow lens, you'll have four different magnifications to choose from;
• A Moon filter Perfectly neutral color will not alter the natural color of the Moon, Enhances the contrast of the moon and planets in photographic images;
• A ND4 25% light transmission Reduces brightness and cuts glare, increasing clarity of the Moon, Venus, and bright double stars;
• The #82A Color filter has uses on The Moon and most planets, enhancing regions of low contrast but without the cost of reducing the overall brightness of the object being observed;
• A portable bag keeps everything safe in the foam-lined interior.

• 7-21mm zoom eyepiece; allows you to change magnification power without swapping out eyepieces; suitable for viewing the lunar surface; planets; nebulae; star clusters;
• 5-elements 3-groups lens structure; 5-elements 3-groups made of high index glass deliver sharp; high contrast vistas; get bright and true image colors;
• 52°-36° field of view; SV135 zoom eyepiece allows you to see different wide field of view under the same viewing conditions;
• 13mm-14mm eye relief; with rubber eyecup; provides comfortable long term viewing for people with or without glasses;
• Standard 1.25-inch interface; compatible with 1.25-inch telescopes and filter accessories; groove anti-drop design; effectively prevents accidental falling during use.

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• The SC311 is designed with Sony IMX662 color CMOS sensor, which uses advanced STARVIS 2 technology. It has the characteristics of no amp glow and very low readout noise, higher sensitivity to red and near infrared(NIR) light；
• 2.4G WiFi technology let you can use 4 devices at the same time and share the fun of astronomy with your friends. Support Android and Apple systems, you can download them in the software store；
• 10M effective transmission sensing distance allows you to get rid of the shackles of the data cable, it is easier to realize the fun of astronomy observation outdoors；
• Built-in 2400mah lithium battery, it can support about 4 hours of continuous work, allowing you to have more time to focus on observations；
• Connect to our SvbonyAstro a software application designed by ourselves. You can do observation on your phone or pad and save them to the SC311 built-in TF card, and then easily share to social media.
• The SC311 camera can be connected via USB cable to a PC. You can use this camera to capture with the AstroDMx Capture program or etc. Also it complies with the standard UVC protocol and no need to install SVBONY driver.  

Reviews of SC311

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This SM501 borescope camera is designed with 1920*1080 resolution, 2 million pixels camera, 40-80mm focusing distance, easy problem finding. It is suitable for multiple scenarios, such as auto repair, mechanical inspection, pipeline repair, appliance inspection and home repair. Remarked performance endoscopes provide a better experience.

• IPX8 Professional Bare-Body Waterproof; The lens is not blocked by a additional transparent waterproof case; it can directly achieve underwater shooting at a depth of 66ft/20m; Allowing you to effortlessly explore the mysterious seabed and capture every wonderful moment; 
• Heat Dissipation without Worries; Getting rid of the confinement of the sealed waterproof case; Excellent heat dissipation performance and not easy to overheat even during long-term use; Ensuring stable and smooth using throughout the process;
• Long battery life; battery life of the waterproof underwater camera is more than 120 minutes; also comes with a spare battery; 
• Magnetic interface; strong adsorption force of underwater camera ensures the stability and durability of the connection; 
• Adjustable angle lens; sports camera has wide; middle; and narrow 3-angle lenses; wide len takes a large and full scene; middle takes a complete scene; and narrow len takes a specific scene accurately; meeting your various shooting needs;
• IPS dual screen; WIFI action camera supports 2.0" IPS HD touch and 1.3" IPS HD selfie screen; choose the screen and take HD videos or photos flexibly; long press the down button to switch dual screen;
• 6-axis EIS; multifunctional accessories Act20 action camera provides stable functionality akin to a gimbal;
• Noise reduction function; supports 3 levels of adjustment; high; medium and low; allow you to enjoy clear and pure sound quality in different environments.

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• 7 Level Infrared; night vision binoculars have 7-level adjustable infrared; 3W 850nm strong infrared spotlight; allowing you to easily watch animals 250m away in complete darkness;
• 4K Video & 36MP Pictures; SVBONY SA206 night vision binoculars can shoot 4K; FHD; HD videos and up to 36 million pixel photos in the day or in the night; you can easily and seamlessly shoot high-quality photos and videos in any lighting conditions;
• 3.2-inch high-definition TFT screen with 15 levels of brightness adjustment; suitable for outdoor activities such as night hunting; patrol detection; camping; wildlife observation;
• 8x digital zoom; night vision goggles can easily observe the target and find more details in a completely dark environment; supports taking pictures and recording videos; and can use TYPE-C data cable for data transmission and sharing with friends; free 32gTF card (up to 128GB);
• Rechargeable lithium battery; built-in a lithium battery of 5000mAh; allows you to run for up to 14 hours; type-c charging interface is compatible with most power banks; ensuring extended usage time.

• Clear Imaging: 90mm large aperture, collecting about 65% more light than other 70mm entry-level models, offering superior light-gathering power and delivering clearer, more detailed images;
• Superior Optical Performance: Fully multi-coated optical glass lenses enhance light transmission, while the internal anti-reflection coating reduces unwanted reflections, ensuring clear imaging and protecting your eyes;
• 5x24 Finderscope: 5x magnification offers a wide field of view for quick and easy target acquisition. The 24mm aperture delivers brighter images, very suitable for beginners;
• 360° + 90° Adjustment: The altitude-azimuth mount features a worm gear drive system, ensuring smooth and precise movement. With 360° horizontal and 90° vertical adjustment, it maximizes your ability to meet all observational needs;
• Precise Focusing: The helical gear manual focusing system ensures smoother transmission and finer adjustments, helping you see clear, detailed views of celestial objects;
• Durable and Sturdy: The astronomical telescope features an aluminum alloy main tube with a spray-painted finish, a stainless steel tripod. The tripod and professional AZ mount can support up to 5 kg.

• 102mm large aperture; large objective lens refractor telescope; high resolution; good light collecting ability; f/6.5 focal ratio; imaging brighter;
• f/6.5 short focal ratio; larger field of view; can collect more light; the image is brighter; and the observation target is clearer and easier to observe;
• Dual-speed focusing; fast focus allows you to quickly move the focus wheel to roughly focus on your target; while slow focus adjusts focus more finely for optimal image clarity;
• Integral telescope rings; the tube rings make the telescope more stable and avoid wobbling; and provide a stable support to keep the optical components of the telescope stable relative to each other;
• Easy to assemble and use; the telescope is designed to be user-friendly; it can be set up quickly without additional tools; you can find a lot of fun in assembling.

Note: The main lens have been corrected completely.

Best Achromatic Telescope for Astronomy Beginners

• • Fashion appearance;Different from the black that is common in the market;The silvery look makes the product look more stylish;The overall appearance is beautiful and upscale;
  • Brass compression ring design; A brass compression ring can protect your eyepiece from marring or scratching the barrel; Keeping your eyepiece in new looking;
  • Lens edges is blackened; The edge of the mirror is matted black; Reduce scattering of stray light and maximize contrast;
  • Non-slip rubber grip ring design; No slip prevent the barlow lens from falling off accidentally; Rubber grip ring for secure handling even in moist conditions;
  • Fully multi-coated lenses;The lens fully multi-coated provide a sharp view; Excellent optical performance with high contrast and high resolution.

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• 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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• 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 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.

• Fine Adjustment Shift: Allows precise fine-tuning of the telescope;
• Variable Speed Gear: The A-Z mount features variable speed gear slow-motion controls on both axes;
• CNC Hollow Structure: Adopts a hollow design, making it lightweight and easy to carry;
• Load Capacity: Supports a payload of up to 10 kg;
• Multi-functional Design: Features a two-stage telescopic design for easy portability. Rubberized feet with a stone-protruding design ensure stability.

Reviews by @JPAstroGuy