William Optics RedCat 91 f/4.9 WIFD Petzval Refractor with Free 32 mm UniGuide - T-C-91
Impossible de charger la disponibilité de la réception
Coming in Late November, 2024! Pre-Order Now!
Get a FREE 32mm Uniguide Scope, valued at over $150, when you purchase this RedCat 91! Offer is good while supplies last...order now!
The William Optics RedCat refractor continues to be immensely popular, but if you'd like more aperture, check out the 91 mm f/4.9 RedCat! This beautifully designed Advanced Petzval astrograph sports five (5!) optical elements, 3 of which are made with Super ED glass for amazing image quality. This optical design produces a flat image plane on its own, with an image circle of 50 mm, without the need for a flattener. With an image circle this big, the RedCat 91 is compatible with full frame or APS-C sensors. The central star point RMS radius is about 1.3um, with corners at 2.1um for pinpoint sharpness across the frame.
The William Optics Cat91 comes with a calibrated helical focuser. The lockable helical focuser has a large surface area that makes it easy to focus, even with gloves. Its precision gear ring makes it more precise than most camera lenses. Behind the focuser is a camera angle rotator with tension knob and a tilt adapter. Adapters include both M48 & M54.
The RedCat 91 comes complete with a saddle handlebar on top. This handle accepts accessories such as a finder or guide scope but is raised above the focuser enough to serve as a carry handle. A pair of super sturdy mounting rings are also included and attach to an Arca Swiss/Vixen style plate, making it easy to connect the Cat91 to a telescope mount or heavy-duty camera tripod.
When you're not using your telescope, you can store it in the included soft carry bag!
Specifications:
Focal Length: 446 mm
Diameter: 91 mm
Focal Ratio: f/4.9
Image Circle: 50 mm
Focuser: Helical
Tube Length: 556 mm
Weight of OTA: 4.72kg / 10.41 lb.
Weight of OTA with Hardware: 6.30kg / 13.89 lb.
Please note that images show lots of optional equipment, including the AM3 mount, camera, etc. The 32mm UniGuide riding on top of the included rings and handle is being included at no charge for a limited time.