• The SV550 APO is a compact refractor with 122mm aperture; f/7 focal ratio and 854mm focal length; a great travel telescope for astrophotography and observation; and even some fainter deep sky objects due to the higher limiting magnitude. It weighs 6.44kg/ 14.18lb; easy to carry out and comes with a carrying case bag;
• The SV550 122mm adopts a FPL-51 triplet apochromatic lens structure which contains one piece of ED glass; the triplet lens provides better correction of aberration and greatly reduces chromatic aberration and enhance the clarity and sharpness;
• The gear ratio of the dual speed 2.5-inch toothed focuser is 1: 10; which makes it easy to achieve accurate focus; the dual speed focuser can provide two focusing speeds by using a set of co-axial knobs; for fast focusing and fine focusing;
• The length of the dovetail is as high as 300mm; it can maintain the balance to the greatest extent; and it will be more convenient in the adjustment process.

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• Use this APO OTA apochromatic refractor to reveal the wonders of celestial bodies; you can observe the Messier catalog targets; the common shooting targets M42 M45; the difficulty factor is simple
• The triplet apochromatic optics structure (1 piece of S-FPL51 low-dispersion ED glass and 2 pieces of correction glass) effectively improves the blue-edge chromatic aberration problem of single-ED structure imaging
• The telescope uses an air-spaced triple optical design that virtually eliminates chromatic aberration; resulting in bright; high-contrast images for exploring galaxies with better graphic clarity
• This little scope also includes the use of a 2.5-inch magnesium alloy dual-speed toothed focus mount (1:10); which reduces vignetting on full-frame cameras and reduces the weight of the support platform
• This APO adopts extreme extinction measures; there are multiple light barriers inside the focusing seat and the inner wall of the lens barrel; and 4 extinction barriers are designed to meet the ultimate pursuit of extinction

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

• 5-band filter captures light across a broader spectrum; Accurately reproduces the true colors of celestial objects;
• Multi-Broadband filter properly designed for starfield shooting and deep sky photography, enhance stars and celestial bodies details; making deep sky observations clearer;
• Over 90% peak transmittance;reduces light loss, boasts an SII-OIII-SII band average transmittance of over 85%; Enhances contrast between the target object and the background;
• 300-1000nm wavelength working range; multi-bandpass filter effectively combats light pollution; providing a broader coverage area;
• Max OD4 cut-off depth; astrophotography filters effectively block out unnecessary light; and provide stronger light pollution suppression.

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• More clear image; APO astro camera lens consists of a 3-group 5-piece petzval objective lens structure; which includes a set of triplet lens; bringing you a clearer image;
• 44mm full-frame; This telephoto lens can avoid aperture blocking; whether mirrorless camera; SLR camera; or deep-sky camera; you can photograph clear image without trouble;
• Mounting kit available; SV555 astrograph is equipped with a bracket and belt for EAF; you can get an accurate angle to photograph quickly and conveniently;
• Single-speed focus; the telescope camera lens supports fine adjustment; enabling you to adjust the photography angle accurately for fast shooting;
• Various aperture range; the astronomical photography lens can adjust the aperture from F22 to F4.5; meeting a variety of use needs; the included graded adjustment ring and scale also make it convenient for photography by preventing accidental touching;
• Compatibility; SV555 telescope camera lens features an M48x0.75 filter thread to install the 2" filter; additionally; the V-style & Arca-Swiss quick-release system is compatible; flexible and easy to use; enhancing the efficiency;
• Convenient to use; the APO astro camera lens is featured with a handle; bracker; and dovetail plate; making it more convenient to use the lens when shooting.

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This sv550 prime focus photography, also known as direct focus photography, is a method of directly using the telescope to take pictures without adding any optical objects between the telescope and the camera.

• Suitable for OTA with focal length within 700mm; SV165 compact mini guide scope can be used with astronomical telescopes with focal length within 700mm;
• Clear and sharp vision; fully multi-coated and achromatic optical glass brings you clearer and sharper vision in astronomical observation and astrophotography;
• Compatible with guide cameras; the 1.25-inch and M42 threaded interface is compatible with SV305 Pro and Orion ZWO QHY and so on auto guiding cameras; guidescope with two T2 extension tubes can assist focusing;
• Front focuser with scale; it is convenient to mark the focus position to improve the efficiency of Repeating focusing; Locking ring can ensure that the focus position does not change during use;
• Six-point guide ring; the angle-adjustable six-point fixation method can adjust the coaxiality of the guide scope and the main telescope according to the needs.

Reviews by@TheNarrowbandChannel

• Compatible with mainstream auto guiding cameras; 1.25in and M42 mount interface designed for compatible with SV305 Pro and for Orion ZWO QHY and so on auto guiding cameras(Some camera models require additional accessories to assist in focusing)
• Sharp image; Ultra wide band fully multilayer coated lens; double glass and the 30mm achromatic optics prevent irritating reflections can bring you bright and clear images
• 45mm helical focus stroke; Allows easy and precise focus adjustments and f4 aperture optics provides a very wide field of view which will help to quickly find the target when performing astronomical observations
• Nylon-tipped thumbscrews; Comes with the mounting rings with plastic tipped screws as not to scratch the scope tube and it can be moved to any position
• Quality craftsmanship; By using high-level CNC metal processing technology; SV165 guide scope has exquisite appearance; delicate feel and beautiful shape; fine workmanship bringing you visual enjoyment

• Global shutter; SC432M telescope camera is a global shutter camera; features a 120 high frame rate per second;
• Large pixels; SC432M camera pixel is 9μm x 9μm; with its high sensitivity; images with finer colors and subtler details are possible; 
• 1.1" frame; SC432M astrophotography camera has a 1.1" large format; a larger field of view; and a larger area than currently recognized planetary cameras; provide clear imaging details; reducing the number of post-processed images;
• Fan cooling; connected to an external 5V1A power supply; type-C power supply; which can lower the camera temperature by 5-10 degrees; long exposure reduces noise and ensures the quality of the picture;
• HCG; turn on HCG mode when the gain value is 140; the readout noise can be greatly reduced and high dynamic range is retained; avoid celestial tailing and increase celestial details.

This SV220 Dual-Band Telescope Filter 2 inches - SV226 Filter Drawer Combination is best for deep space astrophotography.

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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

Enhance your SV503 80 experience with our recommended accessories! Introducing the SV193 flat field flattener/focal reducer, versatile multifunctional dovetail slot, and SV211 telescope handle bar for added convenience. But wait, there's more! Customize your setup with our hot-selling SV220 2inch dualband narrowband filters and SV172 PWM function 430mm dew heater strip.

Explore the perfect combinations in bundle1, bundle2, and bundle3 for a truly optimized astrophotography experience. Upgrade your SV503 80 today and capture the stars like never before!

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 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.

• The ultra-wide 68-degree field of view eyepiece provides a stunning observing experience;
• The eyepiece uses a fully multi-layer coated lens. Broadband green film optical glass increases light permeability for sharp images;
• The multi-element design provides sharp images, highly achromatic, with excellent color correction and contrast;
• Black anodized aluminum housing. Interior is blackened to eliminate light scatter and contrast;
• Foldable soft rubber goggles. Block stray light and also bring convenience to people who wear glasses.

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• SV305C telescope camera adopts the latest IMX662 1/2.8” back-illuminated sensor. Ultra-high sensitivity and ultra-low readout noise, it has better performance in planetary photography and lunar surface photography, and is very suitable for EAA;
• One-key quick setting: high-speed mode and deep space long exposure mode in the sharpcap software, users can choose according to their actual shooting needs, and realize one-key quick setting. It can be saved for convenient one-key setting next time. The unique one-button operation mode makes planet shooting easier;
• UV/IR CUT protective glass with detachable design: If users want to shoot infrared or ultraviolet bands, they can remove the protective glass at the front of the camera by themselves, connect it with a 1.25-inch extension tube, and connect an external IR685, IR850 or UV Venus filter to achieve different shooting experience;
• Using HCG noise reduction technology, when the gain is increased, the HCG mode will be automatically turned on, which can greatly reduce the readout noise, and at the same time retain the high dynamic range of low gain. When the gain value of SV305C telescope camera is 190, HCG will be turned on automatically.

Consumer Reviews of SV305C

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• Multiple uses; SV191 7.2-21.6mm zoom eyepiece allows you to change magnification power without swapping out eyepieces;
• 1.25 inches standard eyepiece; not only for astronomical telescopes; but also for spotting scope;
• 7-Elements 4-Groups lens structure; 7-Elements 4-groups made of high index glass deliver sharp; high contrast vistas;
• M28.5*0.6 filter threads; base of SV191 zoom lens has a threaded adapter which allows standard 1.25in filter;
• 18-20mm eye relief; twist up rubber eyecup and 18-20mm long eye relief provides comfortable long term viewing for people with or without glasses.

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• SV215 zoom eyepiece is a good assistant for you to observe and take pictures of the planets; it is a good helper for the amateur astronomers to observe Venus; Mars; Jupiter; Saturn etc;
• Adjustable focal length; SV215 3 mm to 8mm zoom eyepiece equivalent to multiple eyepieces; this helps you to zoom in and out rather than changing lens;
• Parfocal across the entire zoom range; minor tweaking may be necessary; you do not need to refocus every time you change the focal length;
• Constant field of view and eye relief; the apparent field of view and the usable eye relief to stay the same as the focal length changes;
• Click and stops design; there are clicks and stops as you pass through the marked zoom levels; easy to use even in the dark
• Zoom ring moves smoothly; the zoom is smooth and gradual as you twist the eyepiece;
• 6-element of 4-group lens structure; fully multi-coated optics for remarkable sharpness; contrast and color correction.

Note: The front focal point of the SV215 is located inside the eyepiece body. It requires a main mirror with sufficient focusing range to ensure smooth and focused imaging.  Iis not suitable for 1.25-inch interface birding scopes. 

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Zoom Eyepiece eliminates the need to change eyepieces so you can spend more time viewing the night sky instead of fumbling in the dark when you want higher or lower magnifications.

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• 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.

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• SV705C telescope camera is not only for planetary imaging, but also super well for EAA (Electronically Assisted Astronomy) and nebula Imaging;
• IMX585 CMOS color sensor; Compared with IMX485, it produces up to 45 fps with super low readout noise. It also increases the sensitivity by approximately 1.7 times compared to IMX485. IMX585 has 3 times the number of full well charges, and has a very high signal-to-noise ratio;
• 1/1.2-inch frame, a pixel size of 2.9μm*2.9μm, a maximum resolution of 8.30 Mega Pixel (3586*2180), an imaging area of ​​11.2mm×6.3mm, and a diagonal of 12.85mm, which can obtain rich celestial details;
• The near-infrared sensitivity is 1.7 times that of the previous generation; which can greatly improve the near-infrared shooting efficiency and capture more details of celestial objects under the same exposure time;
• Dual-gain HDR; which still retains a very high dynamic range at high gain; about 8 times that of the previous generation; which can greatly reduce the read noise;
• Based on the back-illuminated sensor and advanced pixel technology; the SV705C's full well charge can reach 38ke; the peak QE of SV705C can reach about 90%; you will get the better image quality;
• The front end of the camera is a CS port; and is also equipped with a C-CS adapter ring; which can be used with C-mount lenses and CS-mount lenses to make time-lapse video; with a fisheye wide-angle lens; it can be used for all-day.

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• 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.

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• 50mm aperture; SV198 is convenient for astronomers to find a target in the sky; a large diameter can obtain a good view;
• Position clamp screw; easy to adjust the guide scope and astronomical tube; especially important for entry level astronomy enthusiasts;
• Optical glass; multi layer broadband anti reflection coating double glue lens; well made edge coating;
• Precise helical focusing with a millimeter scale and 12mm focal path; 
• One scope for multiple purposes; can be used as a guide star and star finder; 
• 45mm T2-Extension Tube Male thread M42*0.75; Female thread M42*0.75; eliminates a range of focusing problems;Tube rings with Vixen compatible dovetail.

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• 8x50 finder scope; 50mm large objective lens enables more light to enter; providing a bright image; making it easy to aim anywhere in the sky; a large field of view of 7.3 degrees;
• Erect image and humanized design; built-in BK7 correct-image roof prism ensures right-side-up; left-to-right correct views; which is in line with the basic observation habits of people;
• Dark field illumination function; under extremely dark observation conditions; the red LED illuminator can illuminate the reticle; assist observation and facilitate finding the target;
• Glass reticle; the glass reticle has higher seismic stability; high precision and long service life; at the same time effectively avoids the problem of the cross line blocking the target;
• Objective lens thread focus and reticle parallax compensation adjustment; ensure the target and the reticle are in the same focal plane; angle adjustment control knob can adjust the reticle and observation angle.

• Versatile 60mm aperture Guide Scope with a built-in helical focuser for precise focusing of potential guide stars; will help guide you to capturing higher quality astrophotos;an ideal addition to any astrophotographers collection of gear;
• The helical focuser simply moves the attached device inwards or outwards while maintaining its orientation;this convenient feature means your field of potential guide stars will not rotate as focus is adjusted, further increasing ease of use;
• For those nights when you don't plan to capture astrophotos exposures, this versatile Guide Scope can double as a straight-through finder scope with an optional 1.25" eyepiece installed;
• The focuser boasts 8 mm of precise helical focus travel;plus telescoping drawtube housing provides up to 35mm of additional back-travel if needed for your particular autoguider device; No extension tubes necessary; a compression ring fitting keeps any inserted autoguider cameras or eyepieces free of pesky scratches;
• The Multi-Use Guide Scope with Helical Focuser also features male T-threads on the focuser collar for secure threaded attachment of guide cameras equipped with female T-threads.

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