New products

The Ultra-Cat 76 is a powerful apochromatic 76 mm refractor designed for astrophotographers who demand very high sharpness and color fidelity.

• Aperture ratio 1:4.8
• Petzval optical design with integrated corrector (five elements in total)
• Temperature-stable lens cells
• Color-pure and sharp imaging even when using a full-frame sensor
• William Optics Internal Focus Design (WIFD)
• Rotator and tilt flange included
• Patented multifunctional handle
• Camera-side connection: M54, M48

The Ultra-Cat 56 is a high-performance 56 mm apochromatic refractor, designed for astrophotographers who demand exceptional clarity and true color accuracy.

• Aperture 56 mm, focal length 269 mm
• Focal ratio f/4.8
• Optical design according to Petzval with integrated corrector (five elements in total)
• No flattener necessary
• Temperature-stable lens cells
• Clear and sharp image even when using a full frame sensor
• William Optics Internal Focus Design (WIFD)
• 30 mm focuser travel
• Rotator and tilt flange included
• Patented multifunctional handle
• Connection on camera side: M54, M48

William offers with the RedCat 71 WIFD astrograph a very well corrected telescope for astrophotography up to full frame format.

• Aperture 71 mm / Focal length 350 mm / Focal ratio f/4.9
• Petzval design with chromatic aberration free FPL53 objective (4 elements in 3 groups)
• Very well corrected and illuminated image field up to full frame format - the corrector is built in - no more adapter battle necessary
• Camera connection via M48 male thread (suitable adapters are available) - working distance 55 mm
• 360° rotation of the camera for the right display window
• Focusing via internal focusing (William Internal Focus Design - WIFD) as with telephoto lenses
• Tilting option for individual adjustment of the camera sensor to the telescope
• Flexible dovetail bar at the base (long version), suitable for Vixen style and Arca-Swiss saddle plates, in addition with 1/4" female photo tripod thread
• Nylon carrying bag and Bahtinov mask for astrophotography are included in delivery
• WIFD R&P focuser - copatible with EAF

With the EDL-24.0, TeleVue has created a survey eyepiece with very comfortable viewing characteristics and maximum contrast.

• 72-degree apparent field of view with high sharpness
• 22 mm eye relief
• Suitable as a survey eyepiece for fast telescopes, but also as a planetary eyepiece for long-focal-length telescopes
• Adjustable eyecup for optimal viewing, even for eyeglass wearers
• 2" barrel diameter with filter thread

• Place the mask on the telescope and point it at a bright star.
• Switch on the camera and observe the constellation on Live View or on the computer. 
• f the image is not exactly sharp, the centre line is shifted. Adjust the focuser until the central line runs exactly through the centre of the star. 
• You have now achieved optimum sharpness. Remove the mask from the telescope again and you can start exposing the image.

• focusers from TS-Optics, Astroshop and many other brands
• Enables the use of the EAF motorised focus system from ZWO
• Manufactured using 3D printing
• Resistant to UV and temperatures up to approx. 80° C
• The Omegon focuser and the ZWO EAF are not included in the scope of deliver

• Place the mask on the telescope and point it at a bright star.
• Switch on the camera and observe the constellation on Live View or on the computer. 
• f the image is not exactly sharp, the centre line is shifted. Adjust the focuser until the central line runs exactly through the centre of the star. 
• You have now achieved optimum sharpness. Remove the mask from the telescope again and you can start exposing the image.

• Place the mask on the telescope and point it at a bright star.
• Switch on the camera and observe the constellation on Live View or on the computer. 
• f the image is not exactly sharp, the centre line is shifted. Adjust the focuser until the central line runs exactly through the centre of the star. 
• You have now achieved optimum sharpness. Remove the mask from the telescope again and you can start exposing the image.

• Large prism design provides a wider field of view and ensures greater tracking accuracy.
• Adjustable prism height for precise alignment with different cameras and telescopes.
• Dual helical focuser enables fast and stable focusing, preventing star blurring due to inaccurate tracking.
• CNC-milled housing offers high robustness, withstands temperature fluctuations and deformation in outdoor use.
• Compatible with APS-C and smaller sensors.
• Supports M54, M48 and M42 threads for broad compatibility and quick setup.

• Supports ASCOM driver and NINA integration;
• 7 12V DC outputs, Regulated Interface and switch1-5 interfaces can be individually controlled on/off;
• The USB port can connect to guide cameras, planetary cameras, etc.; the DC port can connect to DSO cooled cameras, equatorial mounts, electronic focus controller, motorized filter wheels, and electronic field flatteners; and the RCA interface can connect to dew heaters;
• Real-time detection of ambient temperature and humidity to achieve automatic temperature control throughout the process. 

Note:  The recommended PWM value is around 80. When the temperature of the heating belt is 5 degrees higher than the dew point temperature, it will stop heating. When the temperature drops, it will automatically heat up.

SVBONY SV503 Telescope ED 80mm F7 Doublet Refractor OTA for Exceptional Viewing and Astrophotography

• Extra-low dispersion (ED) glass: The SV503 80mm features ED glass for high-contrast, crystal clear, color-accurate images, perfect for discerning observers;
• Fully Multi-Coated Optics: The whole optical lens adopts the technology of ultra-wideband multilayer coating.Fully multi-coated ED optics deliver outstanding views during day or night;
• Dual-Speed Focuser for Precision: Featuring a 1:10 dual-speed rack and pinion focuser, the 2-inch toothed focuser allows for smooth and precise focusing adjustments, ensuring sharp images for both visual observation and astrophotography;
• Top-quality material: The appearance of the SV503 OTA is baked with high-end fine-grained paint,with exquisite appearance and delicate feel,all machined by CNC;
• Areas of application:SV503 80mm F7 telescope would be better begin for astronomy amateurs to do astrophotography.

SV211 203mm Saddle Telescope Handle Bar for SV503 102ED, SV48P 102 and SV550 122APO

• SV211 dovetail base comfortable and convenient carrying handle. After the combined installation, the large-aperture telescope can be easily carried and moved;
• SV211 finder scope mount bracket the length is 203mm, with 2 M6 mounting screws, 4 M4 set screws, and 1 M5 wrench, which can be easily installed and removed;
• SV211 dovetail base full CNC integrated finishing anodized aluminum, not easy to damage;
• It can reduce collision and wear when taking the telescope somewhere.