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.