This sv503 set connected for Eyepiece Projection astrophotography, Not include eyepiece,you can choose eyepiece from svbony website.

• 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.

• High definition photography; bird feeder can capture 4-mega pixel high-definition photos and 1080P high-resolution video; even in low light; you can take high-definition color images;
• Night vision function; you can capture clear black-and-white images and videos within 6m through infrared LEDs even at night
• AI intelligent recognition; it can automatically identify 11000 species of birds; the camera will automatically identify and record videos; identifying birds and learning bird knowledge;
• 2L capacity; the capacity of the food trough is 2L that can store enough food; so you don't need to add bird food as often
• Built-in 5000mAh battery; it can run on standby for about 3 months under normal circumstances; 3W solar panel charges the battery; no need to worry about power issues;
• Large memory; support the installation of 8-128G memory cards; convenient for you to upload to social media platforms; he images and videos automatically be saved in the card;
• 2.4GHz WIFI connection; the camera only supports 2.4GHz WIFI; not 5GHz WIFI; you don’t need to worry about signal loss and missing a moment of your bird visitors.

• 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.

• SV207 1.25-inch spl eyepiece is suitable for observing the moon and planets, which can meet your basic observation needs;
• Fully multi-coated green film eyepiece lenses help achieve a clearer, brighter, higher contrast view;
• The edges of the lenses are treated with black to reduce the scattering of stray light and maximize contrast;
• SV207 1.25" Plossl eyepiece has 2 sets of 4-piece optical structures. Standard M28.5X0.6 thread specification, supports standard 1.25-inch filter adapter installation.

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• SV41 Mini mak spotting scope come with tripod;which folds to less than a foot long and weighs almost nothing; would be a good tabletop tripod for small cameras; a nice soft case that covers the scope completely;including a lens cap and eyepiece cap that makes it feel very safe and secure;
• Compact and portable design mini maks; compact so it is easy to transport and set up;feels great in the palm of your hand;compact enough to fit in the range bag;small powerful easy to transport;light enough to use on fairly small tripods or window mounts;
• 25-75X magnification; variable magnification focusing; easy to zoom in or zoom out; suitable for target shooting;
• 5pcs 3 groups zoom eyepiece telescope; Bak4 Prisms that maximizes light transmission;fully multi coated optics for superior brightness large eye lens for comfortable viewing; no false color no image shift during focusing and no tube currents even taking the scope outside to observe immediately in freezing temperatures;
• Mini mak spotting scope come with tripod; which folds to less than a foot long and weighs almost nothing; would be a good tabletop tripod for small cameras; a nice soft case that covers the scope completely;including a lens cap and eyepiece cap that makes it feel very safe and secure.

• 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.

• 40-2500X magnification; the compound binocular microscope offers 6 magnification levels; micron-level magnification can clearly observe bacteria and viruses cell structure of bacteria; protists; etc;
• 2 power supply methods; battery power supply （3 AA) and 5V1A power interface; two power supply methods can solve your various indoor and outdoor uses;
• Achromatic objective lens; immersing the 100X lens in cedar oil for observation can greatly improve the clarity of image details; and is used to observe finer structures such as chlamydia; bacteria; and organelles;
• LED light; single-bulb LED lighting built into the bottom of the binocular biological microscope, intensity adjustable; transmitted (lower) LED light can be used to view translucent specimens from below;
• Professional binocular head; the microscope equipped with 10X and 25X widefield eyepieces with 53 to 77mm inter-pupillary adjustment; the right eye of the binocular head has diopter adjustment;
• Double-layer mechanical stage; X Y double-layer loading platform for small items need to observe different locations moderate ideal design; allows you to operate the loading table more convenient and precise; dual focusing knob; coarse focusing knob and fine focusing knob;

Note: SM201 uses 33mm Rheinberg illumination filter. It can meet your photography needs ; and it can also connect to computer with SV189 microscope camera.

SVBONY SM202 portable monocular compound microscope has 80x - 2000x magnification and it can magnify microbial targets to the micron level,it also has the mechanical caliper stage and portable arm handle design to meet your observe needs.It is a good choice for agricultural application.

• 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.

• Flat field eyepiece; offer corrected field curvature; you will observe an image not just in the centre but right out to the outer edge;
• Clear image; fully multi-coated and blackened lens edges to reduce reflections; 8 lens 5 groups give you an image of high colour purity and excellent contrast;
• Comfortable; 65° wide field of view keeps stars planets and lunar details in focus across the field of view; 20mm eye-relief is ideal for long intensive observing sessions;
• Eyecup; folded-up eyecup fit for glasses wearers or not; removing eyecup has a m42x0.75 thread for astrophotography;
• 18mm eyepiece; medium power eyepiece for a bright, low power view of the moon and most all deep-sky objects.

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.

• Fully multi coated broadband green optics with superior optical performance, high clarity, and true magnification;
• 66 degree AFOV is ideal for broad field lunar observations, medium-sized star clusters, various cloud-like nebulae, and deep sky targets with extra clarity；
• Multiple lens groups combine to improve optical performance. The eyepiece group provides a clear image with good color correction and contrast;
• Blackened interior to eliminate light scatter, minimize internal reflections and maximize contrast;
• The aluminum 1.25-inch eyepiece tube is blackened on the inside to eliminate light scatter and is threaded to accept 1.25-inch filters.

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• 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.

This Birding Photography scope set includes:

• SA412 20-60X80mm Spotting Scope, SKU: F9339A
• SC311 WIFI Camera IMX662 , SKU: F9384A
• SC001 Wifi Camera, SKU: F9373A 
• SV146 Table Top Tripod, SKU: W9109B

This SA412 Spotting Scope Set is suitable for phone birding photography, you can choose from the items as below:

• SA412 20-60X80mm Spotting Scope, SKU: F9386A
• Table Top Tripod, SKU: W9109B
• SV214 Pro Phone Adapter and blue tooth shutter, SKU: W9176A-W9177A
• SV218 Universal Cell Phone Adapter and blue tooth shutter, SKU: W9169A-W9177A

• The special adapter for SA401;
• M42 Female thread to M42 Male thread;
• 1.25inch interface suitable for the 1.25-inch eyepiece, or Wifi camera

Note: When the eyepiece of the SA401 is removed and connected directly to a DSLR camera using the SA406 adapter, it will not focus, it is recommended to use the SA407 Photo Kit for the SA401.

• 10-30X50 Magnification - Get a clearer and brighter view range with a 50mm lens - the most powerful handheld monocular;
• Durable Outer Armor - Provides a safe, non-slip grip and durable outer protection;
• Waterproof and anti-fogging - prevents moisture, dust and debris from entering the monocular - designed to inhibit internal fogging. For any weather and any environment;
• The brightest and clearest view of each monocular on the market - allows you to get the best view possible for bird watching, wildlife viewing or scenery.

• SVBONY 1.25-inch Prosser eyepiece is suitable for observing weak-light and dim celestial bodies such as nebulae, star clusters, comets, etc. The field of view is clear and bright, and observation is comfortable;
• Adopting true FMC full-bandwidth multi-layer coating, ensuring that each glass surface has multiple layers of coating for better image quality and the edge of the lens is matt blackened to prevent stray light interference for bright and clear views;
• M28.5*0.6 standard thread size, supports standard 1.25-inch filter adapter ring installation, with wide applicability. Standard Prosser eyepiece structure: 2 groups of 4 optical structures to ensure observation effect;
• 19mm shooting distance, convenient for long-term observation without fatigue. The inner wall of the foot cover has two matte threads, and the outer wall is chrome-plated, with a bright and smooth appearance;
• All-metal mirror structure, delicate texture, fine workmanship. Humanized environmentally friendly rubber anti-slip ring design to prevent accidental crushing.

• 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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• SVBONY 1.25-inch Prosser eyepiece is suitable for observing weak-light and dim celestial bodies such as nebulae, star clusters, comets, etc. The field of view is clear and bright, and observation is comfortable;
• Adopting true FMC full-bandwidth multi-layer coating, ensuring that each glass surface has multiple layers of coating for better image quality and the edge of the lens is matt blackened to prevent stray light interference for bright and clear views;
• M28.5*0.6 standard thread size, supports standard 1.25-inch filter adapter ring installation, with wide applicability. Standard Prosser eyepiece structure: 2 groups of 4 optical structures to ensure observation effect;
• 19mm shooting distance, convenient for long-term observation without fatigue. The inner wall of the foot cover has two matte threads, and the outer wall is chrome-plated, with a bright and smooth appearance;
• All-metal mirror structure, delicate texture, fine workmanship. Humanized environmentally friendly rubber anti-slip ring design to prevent accidental crushing.

• The SV152 crosshair eyepiece is ideal for guiding astrophotos when used in off-axis guiders or guide scopes. 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;
• The SV152 cross-eyepiece has a wide 70-degree field of view, making it a breeze to acquire and focus on target objects;
• Comfortable 16mm eye relief means you don't have to worry about your target disappearing quickly;
• This SV152 illuminated single reticle eyepiece has adjustable brightness. Relatively low energy consumption at lower brightness can extend the life of the illuminator;
• The standard 1.25" filter thread is compatible with all 1.25" standard equipment. The thread matte inside the eyepiece can well suppress the reflection of internal stray light, giving you a bright high-contrast view.